What are the chances your boyfriend is gay when his identical twin brother is gay?

== == * In my opinion not much chance. Sometimes it's what people nurture as in they are born that way and sometimes its nature, this is them adapting it from society or starting to like the same sex. I am a twin, I'm bisexual, and I'm a girl. My brother is somewhat homophobic so he cant know about my sexuality. As you can see it's what we want and not because you're a twin and gay it doesn't mean the other one has to be one! nonsense.

== == * Little to none. Homosexuality is not genetic and he is dating (I'm assuming) you're a woman. == == * I believe personally it is genetic (some gays may learn to enjoy a same sex partner from puberty on without having gay tendencies to begin with.) Two of the most convincing studies have proved conclusively that sexual orientation in men has a genetic cause. An examination of twins by psychologist Michael Bailey of Northwestern University. Among identical twins, he found that if one was gay, the other had a 50 percent chance of also being gay. Among fraternal twins, who do not share the same DNA, there was only a 20 percent chance. To the person who asked this question don't jump to conclusions! There is also proof that one identical twin can be gay and the other is not. There are many studies going on with twins and the genetic factors re homosexuality. You should know your boyfriend enough to be candid with him and ask him straight out if he has ever felt as if he were gay like his brother. I have no doubt he will say a flat 'No' so take it as that! Gay men are not interested in women sexually (will often have many women as friends only.) * I am an Identical twin and I am gay. So I feel like I am the best person to answer this question. I personally believe I have been this way all my life and my brother is his own person and shares nothing other then a same look. Personalities are different even in twins so are preferences. I live in a dorm with my boyfriend and my brother lives downstairs and is visited by his girl friend. If he says he is not gay, he isn't. If you don't believe him, break up - no use being with someone you don't trust, and I doubt a gay person in a comfortable situation (gay brother) would date a woman. Only men who are ashamed or feel uneasy about being gay would date a women.