Devastating blow

When you’re giving a blow job, and as he’s about to finish, you launch an upper cut directly in the nutsack while yelling “devastating blow!” He busted but now he’s out of commission.

Steve: “hey Johan what did you get up to last night?”

Johan: “well I got with this girl off of a dating website”
Steve: “oh yeah? And how’d it go?”
Johan: “not great considering she gave me a devastating blow!”