Man, Dave Grohl's pretty hot. Pretty damn hot. I'll just have a cheeky groin clench over him as there's way too many people on this damn bus to get proper involved with myself.
Example 2:
A: Girl, you want to get out of this club?
B: Babe, I'm groin clenching at the though of it!
A: Oh Baby! Hummuna Hummuna!
Example 3:
That boy in that advert is pretty hot. I think he deserves some special attention but it's been a long day so he'll just get a groin clench or two.