Very few areas of psychology have been as controversial as the study of sexual orientation. Questions abound. What percentage of people are gay? Why are some men and women attracted primarily to a same-sex partner? Is it a matter of choice? Or is sexual orientation determined by biology? Although it seems as if every other TV sitcom has an endearing gay character, very little information is given out to help answer these questions. Recent research has come up with a few provocative new theories.