Alright nerds, here’s the (scientifically accurate) answer in a chart:

Y\X| Fem | Boy
——————————————
Tom | FemTom | TomBoy
——————————————
Boy | FemBoy | BoyBoy

So it’s either one of the parents, a girl named Tom or boy².

Ahh yes, clanker yaoi

Hate to break it to you but that’s the joke. The person on the right is a guy.

Alright nerds, here’s the (scientifically accurate) answer in a chart:

Y\X| Fem | Boy
——————————————
Tom | FemTom | TomBoy
——————————————
Boy | FemBoy | BoyBoy

So it’s either one of the parents, a girl named Tom or boy².