Actually I didn't see anything wrong with the lyrics, either (after all, it's just about sex and BJ have such songs in their catalogue, no big deal)...until I came across a little dirty explanation as to what exactly the title means ;]
I guess it wasn't even about this particular song or band, just the concept/phrase itself. Playing with words can be very sexual, indeed.

btw. I LOVE rock ballads, the rockers can sing about love (snd lust, sex and stuff) like no other