Superstition about women on boats, so that's how they get around the technicality. I'd say it's silly but there's quite a bit of magic in this world so who knows, eh?Now here is a serious question, cause im going to have to make fun of this part, but you and the "girlfriend" get kidnapped by pirates, they sell your girlfriend just so they can turn you into a girl look-a-like just so they can feel comfortable fucking you in the sissy hole, or violating you in everyhole they think they can since your male limits them down to two holes instead of the three if they just sent you to davey jones locker and kept the girlfriend to violate at there leisure....lol. of course that would be a pretty short story.