The scene is set in a snooker hall.
Two guys are playing snooker and chatting about their wives.
First guy: "Our sex life isn't what it used to be."
Second guy: "Why's that mate?
Camera cuts to first guy who is attempting to take a shot with a long piece of rope instead of a snooker cue.
This is my first sketch.. hopefully not my last.
I like that, very good!
Yeah, funny.
But!
George Burns: "Sex at age 90 is like trying to shoot pool with a rope."
http://en.wikiquote.org/wiki/George_Burns
You little tinker, Nigel. God, I'm a sad individual to find this old thread.
Good stuff, mate. keep going 
Yes great.
Now what does anyone think of my darts sketch below, it's gone unnoticed...boohoo
I did like this one. Unexpected punchline and cuts to the chase quickly.
If the pocket was visually very hairy (overgrown) or something equally coarse may get an extra laugh.
Dan
It's an old joke, but a good joke.