"Blonde in Love" joke

A blonde and a guy were out on a date and they ended up
at Lovers Cove, where they were making out. The guy
thought that things were going pretty good and maybe
he would get lucky tonight, so he thought that he would
ask her if she wanted to go in the back seat.
NO! yelled the blonde.
The guy just figured that she wasnt ready yet. Things
got pretty hot and the guy thought he would try again.
NO! the blonde yelled again.
Things got even hotter and the blond was down to her
bra and the guy even had her pants unzipped.
Do you wanna go in the back seat yet? asked the guy.
For the last time, NO! said the blonde. Frustrated,
the guy asked, Well, why the hell not?
The blonde looked at him and said,
Because I wanna stay up here with you.