"Back seat" joke

There was Jenny and Bill at a hot make out spot gettin there kissy kissy on. Bill asked Jenny, "Ya wanna get in the back?".

Jenny replies, "No!".

They go a little farther and Jenny's shirt came off. Again Bill asks, "Ya wanna get in the back?".

"NO!!!!!", replies Jenny.

A few minutes later, Bill puts his hand up Jenny's skirt. Again he asks, "Are ya sure ya don't wanna get in the back?".

"NO!!!!!!", replies Jenny.

"Dammit!!!", says Bill, "Why don't ya wanna get in the back?".

Jenny quickly replies, "Cause I wanna stay here with you!".