Don't put that idea out there, because McEngineer is absolutely the kind of low-down scoundrel to try to weaponize immaturity and they'd create a superweapon.

And that's cheating, because...well...he said so, and he's the one on top right now so he decides. So there.

"Or else what?" Oh good luck answering that question while he exploits that wriggling squeak of hers, digging in with extreme tickling, all while trying to pull away from her own tickly fingers, which probably looks weird and squirmy, but shut up and be tickled and acknowledge his complete supremacy.