Sexual orientation doesn't originate only from biology

Since it is a 3 round debate, I think it will be fair enough only to out forward both my arguments and rebuttals in round 2 itself so that I dont end with a rebuttal in last round and my opponent gets to rebut me in round 3,where I will put a conclusion only.Now initialy I did misunderstand the topic thinking that my opponent thought environment was the only factor for someone being homosexual. However, I strongly think that homosexuality does originate from biology and biology only.Now, my opponent and I are on the same page when it comes to biology as a factor for sexuality. Therefore I do not to reinforce arguments to show that biology is a factor for sexuality. However I need to show that environment does not play a role in determining sexuality which I will be doing by showing events in which someone turns heterosexual in 'pro homosexual environment' or vice versa and putting rebuttals to opponents arguments.ARGUMENT Sexuality in animals - Homosexuality is very strongly observed in animal kingdom. Although even animals are social beings,are there environmental factors which contribute to homosexual behaviour? Complex social structures such as those in humans being society does not exist for animals, why then, there are queer animals??http://www.bidstrup.com... REBUTTAL1. Judges may note that the link shows the trends on sexuality. How the physical factors lead to variation in sexuality has no mention whatsoever. People in cities are more likely to be homosexual. It is beyond doubt that personal freedom of expression is more appreciated and prevalent in cities than in small towns or villages. It is very much obvious that people living in places other than cities will find it easy to reveal their sexuality. There is no proof to show that there are less homosexual people in non city places,it only means that people living in non city are afraid to express their sexuality. Animals regardless of the kind of place they live will the show the same amount of variation of sexuality,be it zoo or wild. http://www.sfgate.com...(zoo and wild refers to change in environment) Had it been that the penguins initially turned homosexual in the event of lack of female counterparts,they woud not have refused the offer of a female who are abundant in wild.Family issues 'Having a family issue is a reason for sexuality variation.' Judges may note that how family issues change change sexual behaviour. The link provided only gives a statistical account. Statistics does not give reasons to the graphs it only shows graphs. http://www.evalued.bcu.ac.uk...2. Younger men from Sambia tribe fellate other male as a rite of passage http://www.orijinculture.com...It may be seen that the 'homosexual' behaviour is only a ritual. The people AFTER the passage DONOT ENGAGE IN ANY FORM OF HOMOSEXUAL BEHAVIOUR. If social factors had such a role in sexuality, many of the tribesmen would have turned gay.3. If any kind of behavious is created by environmental factors, or society, they should be able to be healed using therapy like the one that has been used for rape victims and criminals. If being gay has a social/environmental factor, then therapy of any kind must change them into heterosexuals or 'reduce the amount of homosexuality' http://www.hrc.org...http://www.drdoughaldeman.com...http://www.livescience.com...