I can't believe they sell these things.
Dirk Yates KP-20 Cyberskin Knob Polisher
WTF??? This must be a gag gift, because it worries me to picture the kind of psycho ex-vet or (worse) vet-wannabe who'd want to stick his dick into that thing. Who in their right mind would want to fuck a grenade? And if you do, then something made out of rubber isn't going to do it; you need to get down to the Army Surplus store and pick a (hopefully) inert one and do it right.