We're a couple exploring some BDSM toys, I ask you to let me top you, but you're embarrassed because I have a cock that's a little bit bigger than yours. While I'm in the shop a sales associate there gives me something special.

We're in the bedroom playing with our toys, and I surprise you with it, a cock cage, it actually causes your cock to dwindle, and mine to grow bigger and stronger. It even makes me feel so good, so strong that I have to use it on you. Just railing you with it as it grows and you shrink.