Question

biology has classified human beings as hetrosexual but than why are some humans turning into homosexual? Is it a psycological issue or biological issue?

Answer 1

its a psycologycal disorder..

Answer 2

but biological problem would also be there may be some hormonal imbalance...

Answer 3

ya its also possible...

Answer 4

it is both, biological prob. leading to psychological prob. n vice versa

Answer 5

Its a problem of sexual orientation.....i attended a seminar where this topic was given as topic similar to a synopsis presentation....here the student is randomly given a topic and he or she must read about its scientific paper round the year and present it a end of course work

Answer 6

Biology has NOT classified human beings as exclusively heterosexual. In any given population, there will be non-breeding individuals, and in a significant number of species, at least some of these non-breeding individuals have sex with and/or pair-bond with members of the same sex.

It is, for obvious reasons, biologically advantageous to have the MAJORITY of the population as hetero- or bisexual, but there are potential advantages to having a minority of homosexuals in a population: for one thing, since they are less likely to have babies of their own, they have time/resources that they can devote to raising the offspring of others in the population. There are loads of examples of species where non-breeding individuals (e.g. worker ants or bees) help their mothers or siblings raise new offspring. In species where human-like homosexuality has been observed, e.g. birds, homosexual pairs have shown themselves willing to adopt, thus ensuring the survival of animals that share many of the same genes as the homosexual (or otherwise non-breeding) individuals.

It's also possible that the hormones/genes (we don't know which: it's most likely a combination of the two) that make someone homosexual have some advantages to them when they show up in heterosexuals. Think sickle cell anaemia -- it's a disease, but the heterozygous form provides resistance to malaria, a HUGE advantage in some parts of the world.

As for the psychological issue hypothesis... honestly, I haven't seen any compelling evidence for that. There are just too many kids from completely normal family backgrounds who grow up gay but have heterosexual siblings. I guess it's possible that a small number of biologically heterosexual individuals might, as a result of trauma, grow up so messed up that they THINK they're homosexual... but there are probably even more homosexuals who are so messed up by e.g. political/religious hate propaganda and grow up thinking they're heterosexual, so it balances out.

Answer 7

@Calliope is right! It's worth noting that the American Psychiatric Association (APA) no longer considers homosexuality to be a mental disorder (since 1973).

Answer 8

@Calliope and @kma230 are both right - but this one is so important that it needs to be said again and again by as many people as possible.

Homosexuality is not a disorder of any kind, physiological or psychological. Sexual orientation is to some extent determined by genes (many, many genes with many alleles) and to some extent by environment - the importance of both factors almost certainly differs between individuals. Most experts agree that sexuality is a continuum - with homo- and heterosexual being different extremes with many shades of grey in between.

To be absolutely clear, there is *no* single "gay" gene or "straight" gene which predetermines an individual's sexual orientation.

There is also some data, at least in males, which suggest that younger sons are statistically more likely to be homosexuals than their older brothers. Some scientists speculate that the mother's immune system suppresses male antibodies the second time around but compelling data is lacking. Environmental or behavioral responses might also be the cause, or it might be a statistical fluke.

Calliope's discussion of breeding and non-breeding individuals is accurate and thorough. I would like to add that homosexuality or same-sex mating has been found in enough other species that many biologists now believe it is common or even ubiquitous in the animal kingdom. I believe the Vancouver Zoo recently decided not to separate two male penguins who plainly liked each other under their similar policy of not separating male-female mating pairs. The implication that same sex attachments have the same standing as male-female relationships is profound.