Yes, that is how humans reproduce.
penis
If your penis is small enough, I suppose so.
either one can stick it in. it's not that difficult.
The male inserts his penis into the female's vagina.
You Stick It In Ice Water
a penis
in the girl's Virginia
using their penis
He wants to have sex. That's as in "stick it (his penis) in (your/a vagina)".
Your hand.A piece of fruit.A condom.
WASH IT and watch where you stick it
the stick their penis in their vagina