This is a Jimmy Jones joke if I remember correctly, I'll try to keep it clean
A man punk goes to a party and see's a lady punk he likes.
He goes up to her and says "Hi doll, you can dance with me if you like"
She says "I willlllll"
They dance for a bit and the punk man says "You can buy me a beer if you like"
She says "I willllll"
So she buys him a beer and they carry on dancing until the man punk has enough and says to the lady punk "You can go home with me tonight if you like"
She says "I willlll"
So they go back to the man punks flat and start playing records until the man punk gets a bit hungry & says to the lady punk "Ere doll, I'm a bit hungry, you can make me some sandwiches if you like"
She says "I willllll"
So they're both a bit drunk and well fed and the man punk starts to feel a bit randy & so says to the lady punk "You can sleep with me tonight if you like"
She says "I willlll"
So they go to the bedroom and have a bit of romance.
Afterwards the man punk looks at the lady punk and says "In about 9 months, you're going to have a baby, a baby boy. You can call it Peter if you like"
The lady punk then looks at the man punk with a glint in her eye and says " In about 2 weeks you're going to have a rash, you can call it measles if you like"
I watched him a couple of weeks ago, that guy is so funny.