A (mostly) required action taken to jump into another round of intercourse. Think of a pool floaty that’s been thoroughly used over the course of a party; it needs to be blown again to make it nice and pumped up and stiff to enjoy some more.
Bro 1: “All of her friends found out I can last more than 1 round.”
Bro 2: “How did they figure that out? What’s your secret?”
Bro 1: “It’s not really a secret, she just gave me that Round Two Suck Start.”