When a woman says she is going for a “Long Bath” it’s an opportunity to masturbate without the kids bursting in. Also known as “Playing the Welsh Banjo”
When a man attempts the "pull out" method of contraception but waits too long before pulling out. The man ejaculates just as his penis is removed and bathes the woman's "clam", as is often done on Long Island.
I told him to pull out and not get any one me, but instead the schmuck gave me a Long Island clam bath.