What are the biological reasons for sexual attractions?

Question

For example, why am I more attracted to brunettes than blondes or redheads?

Answer 1

Factors determining sexual attraction to human males
Gustav Klimt's The Kiss (Klimt painting), oil on canvas, illustrates a couple sharing a kiss.
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Gustav Klimt's The Kiss (Klimt painting), oil on canvas, illustrates a couple sharing a kiss.

The initial attraction usually begins with the physical features of the human form and attire, and by a positive expression of the face and body.

For heterosexual and bisexual females as well as homosexual and bisexual males across the world, regardless of culture, the one near-universal trait of attractiveness for a man to have is a V-shaped torso: a relatively narrow waist offset with broad shoulders. While some cultures prefer their males huskier and others leaner, the rule of a V-shaped torso generally holds true.[citation needed]

It has been studied that women prefer more masculine men during the fertile period of the menstrual cycle and more feminine men during other parts of the cycle. Masculine facial features are characterized by a strong brow and a broad jaw while feminine features are less pronounced.

It is thought that sexual attractiveness of a man to some women is somewhat determined by the height of the man. In modern culture it is usually an importance that the male be at least slightly taller than the female for a long term relationship to form. Some women prefer that the man be at least a little above the average in height in the given population of males because it unconsciously seems to them as a sign of dominance and masculinity. Although height is one aspect of male to male dominance as men mature this aspect becomes less so. Height says very little about one's health and fitness in most cases in areas of the world where the vast majority of people reach their genetic growth potential.

Those who believe that the muscular contour of a male is attractive will choose males with well-defined muscles. Males who make use of their hormone, testosterone through exercise or bodybuilding techniques typically find themselves more attractive as their muscles take shape.

At various times in history and throughout various cultures and sub-cultures the growth, maintenance and display of facial or body hair produced as a by-product of testosterone activity within male bodies has been considered a primary characteristic of sexual attractiveness, and of a display of masculinity in general. Cultural development seems to oscillate through multi-generational cycles from one pole to another: extreme hair growth, especially of facial hair accompanied by elaborate grooming rituals is often followed within a couple of generations by a widespread antipathy to body hair and the widespread adoption of depilatory practices.

The causal mechanism for this oscillation has not been established but differences in the simultaneous characterization of body hair attractiveness within a culture between different social classes may indicate that the dynamic force driving the diffusion of differing male body hair social practices is in fact mate selection by females.

Answer 2

even with the actuality that maximum human beings wont admit it, it really is amazingly well-known and straightforward for siblings to experience charm all through adolencesenc and or perhaps into adulthood. no longer purely siblings yet its straightforward for family individuals individuals that are close in age to flow threw this fantastically if the spend an excellent type of time round one yet another. there are countless study that tutor sexual charm for an older relative which contain aunts and uncles even mom and father isn't that uncommon so do no longer imagine that your a freak weirdordo because of it and proceed utilising your besjudgmentent. i'll admit and confindently say that i'm no longer a creeper or wierdo in any respect that i'm grateful for my woman cousins turning out to be up for education the thanks to kiss and make out for years in the previous and thanks to that i under no circumstances felt awkward with women turning out to be up and had an excellent type of self assurance that led to me having a very healthful sex life with a deferential type of ladies all through jr severe and severe college. so if shes warm than evaluate it an advantage that you idea about her breasts.

Answer 3

i think it comes down to our primative side, like red and blue.

Answer 4

DanE, sums it nicely.