Foreskin Technique

When an uncircumcised man pinches his foreskin together right before he cums, so that he contains his semen in his foreskin before disposing of it at the toilet or in a bin, to avoid needing to using tissues or a cum sock.

Mary: I went to Rui’s house the other day, and there were no tissues in his bin... Does he even masturbate?
Cheryl: He probably uses the Foreskin Technique