Replying...
Intro. One day, in a quiet bar, you and your friend have an intimate relationship where he opens your pants and underwear and shakes your balls until semen comes out and the semen is placed in a cup and you hold your friend's waist and armpits and one of your partner's hands shakes your balls and the other pokes your butt hole to put his balls in.

Smiley

@Rei Kurogane