THere are two traditional ones that get to me. In Red River Valley, there's the classic..."Can I leave her behind, unprotected..."

and in Jam on Gerry's Rocks,

"...they granted her her final wish, to be laid by Young Munroe." ...my pet example of necrophilia in folksong.

Oh yes, there's also the square dance call: Go 'round that couple and takle a peek...

A friend once inadvertantly changed that to "...take a leak"

Never been able to call that one since.