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1. يمكن تنزيل هذه المحاضرة من موقعي redsulfur.net

2. ATTRACTION IN THE LABPROF IHAB YOUNIS It is the woman who chooses the man who will choose her Paul Géraldy (1885-1983)

3. I. PHYSIQUE

4. Women prefer more masculine-faced men (arrow) around ovulation • Women prefer feminine-faced men when judging the attractiveness of men’s faces for a long term relationships Conway CA et al,Br J Psychol, 2010

5. Attractive female faces: • The vertical distance between the eyes and the mouth was approximately 36 % of the face's length • The horizontal distance between the eyes was approximately 46 % of the face's width Pallett P, et al., Vision Research, 2009

6. Women prefer males with broad shoulders and average waist-to-hip ratio 0.9, which forms a “V” shape Dijkstra P & Buunk A, Evol Hum Behav, 2001

7. In women a waist-to-hip ratio of 0.7 is the most physically attractive Braun MF& Bryan A, J Soc Person Relation,2006

8. In USA Women rate men with no body hair as most attractive, and that attractiveness ratings decline as hair increases Dixson BJ, et al, Arch Sex Behav , 2010 • The same authors found that moderate amounts of trunk hair on men was most attractive, to the sample of British and Sri Lankan women Dixson BJ, et al, Am J Hum Biol, 2007

9. Men have been found to prefer long-haired women Buss D, The handbook of evolutionary psychology , 2005

10. Women are more attracted to men with a darker complexion as they seem virile and brooding Baumann S, Poetics, 2008

11. women often prefer men taller than they are, rather than a man with above average height Sear R& Marlowe FW , Biol. Lett. 5 (5): 606–9, 2009

12. “It is the end, I’ve grown & you have not” • Most men prefer shorter women & tend to view taller women as less attractive Scar, R., Human Nature Winter, 2006

13. Men are more attracted to fairer-skinned women as they appear innocent and pure  Baumann S, Poetics, 2008

14. II.SCENT

15. Pheromones are chemicals secreted by an animal that influence the behavior or development of other members of the same species. Queen bees, for example, give off a pheromone that prevents other females in the hive from becoming sexually mature

16. Women provided samples of natural body odor just before ovulation and on a low-fertility cycle day • Men preferred the scent of odors collected just prior to ovulation Gildersleeve KA et al, Hormones behav, 2011

17. Exposure to male perspiration pheromones can brighten women's moods, reduce tension and increase relaxation, and also has a direct effect on the release of LH Preti et al, Biol reprod, 2003

18. Size 1oz Our Price 48 $ • Men were rated more attractive when assessed by women who had been exposed to androstadienone by applying either placebo or androstadienone in sufficient quantities to saturate the area of skin between mouth& nose Saxton TK et al, Horm Behav, 2008

19. III-SOCIOLOGY

20. Similarity (like-attracts-like) • Individuals who share similar level of attractiveness are likely to form long term relationships • Folkes VS, Person Soc Psychol Bullt, 1982 • Exposure effect The more we are exposed to something, the more we come to like it Miller R, et al, Intimate Relationships , 2006

21. Complimentary Studies show that complementary interaction between two partners increases their attractiveness to each other Nowicki S & Manheim S, J Res Persona, 1991

22. Social and cultural background People prefer their romantic partners to be similar in certain demographic characteristics, including religious background, political orientation & socio-economic status Buss D. M.&Barnes M, J Person Soc Psychol, 1986

23. Comedy • A woman is attracted to a man who makes her laugh • A man likes a woman who laughs at his jokes Bressler E, Ph D thesis, Psychology& Neuroscience Dept,McMaster univ.,2005

24. WHY ?

25. These preferences may be a consequence of ancestral humans who selected partners based on general indicators of fitness which allowed for greater reproductive success as a result of higher fertility in those partners Little, A. C et al , Behav Ecol Sociobiol, 2006

26. The “Golden Ratio” is the ratio of the larger segment, AB, of line AC to the smaller segment BC of the line AC • It was used by ancient Egyptians &Greeks and many artists • Attractive faces may have dimensions that follow the “Golden Ratio” Fett B, TMME, 2006 A B C

27. In short-term relations, women prefer more masculine faces at peak fertility of the menstrual cycle to enhance her offspring's quality • But for marriage, preference is for feminine faces. Men with masculine faces have higher circulating testosterone levels which are linked to aggressiveness and lower levels of attachment in relationships Little AC & Jones BC, Psychoneuroendocrinology,2011

28. People in the ideal hip-ratio range, regardless of weight, are less susceptible to disease such as cardiovascular disorders Vaidya D, et al, Int J Obes (Lond), 2012 • Women in this range also have less difficulty conceiving http://www.livescience.com/7023-rules-attraction-game-love.html

29. Men may prefer women with larger breast because these women with tend to have higher levels of estradiol and progesterone, which both promote fertility Jasienska G et al, Proc. R. Soc. Lond. B , 2004

30. Male body odor(produced by androstenone) is usually perceived as unattractive and unpleasant by women • This evaluation changes during ovulation and androstenone becomes less aversive Kohl JV et al, Neuroendocrinol Let, 2001

31. During ovulation there is an increase in T levels of human males, ie, somehow, the female was signaling the male that she had ovulated, and that he responded • Increased T may lead to increased intercourse Morris NM, et al, Arch Sex Behav, 1987

32. Women and men were typed for their HLA-A, -B and –DR • Women were asked to rate the odors of T-shirts worn by the men for 3 days • Women scored male body odors as more pleasant when these men had a different MHC than when they were more similar

33. This difference in odor assessment was reversed when the women rating the odors were taking oral contraceptives • This suggests that the MHC or linked genes influence human mate choice WedekindC, Proc. R. Sac. Land. B , 1995

34. THANKS