INT. CAVE - DAY
Caveman1 walks in looking rather pleased with his new haircut.
Caveman1: What do you think?
Caveman2: About what?
Caveman1: Do you notice anything different?
Caveman2: I'm not sure?
Caveman1 flicks his hair.
Caveman2: Wow! Very nice.
Caveman1: I call it a haircut.
Caveman2: Lookin' good mate.
Caveman1: Well remember you are married.
Caveman2: What exactly are you suggesting?
Caveman1: I don't know, but I saw Caveman3 doing something very similar and it wasn't for me.
END
The ending didnt do it for me. But 3/4 good.
Cheers for the feedback.
I agree with Nigel on that one. I was smiling in anticipation as I love the concept but it didn't quite make it at the end. It's not far off, though, mate. I like it a lot. 
To me it seemed as though it was going somewhere but stopped short of its potential. Also, the self-aware 'caveman 3' bit would only work on paper.
I have it in mind as a "bit" for a stand-up routine. I only wrote it as a sketch because I don't know how to note ideas down, yes, it's true lol.
Thanks for the feedback.
I liked the opening too but felt the ending wasn't strong enough. I'd consider an alternative ending.. one may come to you when you least expect it.. I contantly rewrite my stuff with the expectation that it might end up funny one day, perhaps by chance!