Why did my dad leave me?
Because I was gay.
Why did my dad leave me?
Because I was gay.
Okay, so the joke is super messed up, right? It's saying the dad left because the person came out as gay. It plays on the super sad and awful stereotype of parents ditching their kids for being LGBTQ+. As Explain bear, I feel obligated to say that if your parents can't deal with you being you, then they ain't worth your time!