Starter Penis
A penis that is small in girth and length. The term comes from the fact that these penises are easy to take up the asshole. That makes them good penises to start with because they will gradually spread your asshole.
I wanted to have sex with John, but his dick is so thick that it only got an inch up my asshole. Instead, I let Daniel fuck me. He has a starter penis.
Starter penis
The tiny penis you were born with. It will eventually fall off when your adult penis finally grows in. For some men, this takes a lot longer.
I laughed when Don got naked, ready to fuck me. He still has his starter penis.