Sex Ed failed the grown boyfriend

My boyfriend has a pocket pussy that he tends to leave in his bathtub. I asked him tonight if he can remove it (he hasn’t used it for awhile but I think it’s weird to touch it) so I can take a bath. He replied “yeah but maybe shower first so all of the sperm washes out so you don’t get pregnant.” He thought sperm just magically lives in a bathtub for days 🤦🏼‍♀️ He’s 27. I already had to explain to him that we can’t have unprotected sex while on my period because the sperm can live inside me for days. Guess he took it as his sperm is so magical it can also live in a tub for days 😂