When one man loves another man very much, and one man has a VERY large penis and the other has a very SMALL penis, and the man with the small penis sticks his penis inside the urethra of the large penis, then they have needled.
"Alright, now slide your penis into my penis..."
"OH GOD YOU'RE NEEDLING ME! HOLY SHIT! AHHH GOD!"
"So you're saying that when two men needle and one man cums, then semen will enter the other man's penis and mix with his semen and then go back into the first man's penis and then the process will repeat? COOL!"
"Oh, god, I can't believe we just needled. I mean, at first I didn't think it was even possible. I need a smoke"