just remember that the reason your born is because your parents are straight.
my parents were both bisexual try again
i was raised by rocks with googley eyes stuck on them
You also can be gay and have a child. You don’t have to have sex to have a child. There’s this thing called artificial insemination. In that situation you can be born to a gay man and a gay woman but be raised by two gay men/women. Such as,gay man donates semen, gay woman is inseminated by it, beautiful gay created baby is born and raised by gay woman and her wife.
tl;dr: fuck you, you’re wrong. Science.
Not to mention what’s in your pants don’t determine what gender you are so a trans man and a cis man could make a 100% gay couple fully capable of having a child if they wished.