Character A is fucking male Character B, and after B orgasms for the first time potions get used instead of or mixed with lube. Great for a prostate massage that hugely expands how many orgasms B can go through.

If anyone feels like giving it a go, extra credit if character B is any of the Unsundered, Thancred, Fourchenault (if A is Ameliance), Cyr, or Jullus. I’d rather not have underage characters, incest, Athena, or noncon.