Words that are .......well just funny

sphincter.

gooch

poop

Nigel

dildo

Bugger!
My nan used to tell me off for saying it as a kid. I never understood why it was rude. I just thought it another word like whoops, because most people use it in that context. Naivity is bliss, lol.

Girth

Banjo

crease

Smegma (don't ask it's horrible)

jiggle

bouncy, flatulence, tattybojangles, nips, schlong, bender, gobble, chafe, spunk, gusset, pube, tinkle, cockle, cockchafer, droopy, dangle, dingleberry, dingus, poodle, queef

skank

Shoeburyness - once described (viz?) as the warm feeling you get when taking a seat someone has just departed from.