First, you don't have a choice in becoming gay. If you're gay it's because you were born gay; if you're straight, it's because you were born straight. Second, society doesn't force anything on you. If you're gay you're free to pursue a same-sex partner. If you're straight you're free to pursue an opposite-sex partner. Nobody is forcing you to be what you aren't, except for those who are opposed to homosexuality and would insult, shame, harass, or legislate you into the closet. Luckily times are changing in all those regards. Third, the only thing you have a choice on is actually being yourself openly. If you're gay you have a choice of whether or not to pursue a same-sex partner and be in a same-sex relationship. Behavior is a choice, but your deep inborn feelings of attraction are not a choice. Some gay people choose to remain in the closet as their individual situation necessitates, and others choose to be out and open about their sexual orientation. But in either case, their attraction to mates of the same sex is due to how their brain is wired since birth, exactly as those who are heterosexual and are attracted to others of the opposite sex are that way because that's how their brain is wired since birth.