Not a joke but a true story from an old very crude friend of mine, Greggsy. We were on a lads holiday and as always late at night the subject was sex (yes young uns, us FOC's were just the same as you, sex wasn't invented by your generation).
Anyway, Greggsy's tale, not verbatim obviously:
"I met this girl in a club in Ashton, went back to her place, got down to the nitty gritty, thought I'd get down and get with it so south I go, thought there was a bit of something unusual down there, came back up for oxygen, feeling like something wasn't right. Went to the bathroom and realised the girl had obviously reached a different part of the month"
The punchline which had us all pissing our sides like a bunch of hyenas (bear in mind we were bladdered):
" I looked like Mr Ribena Head"
Sorry if I've put you off your red wine or rum and coke.