First it’s not porn stash; it’s porn ‘stache.
On another forum frequented by many veterans a call-sign of “porn ‘stache” is considered to be a very good call-sign. Our dead muslim failed to understand he was be complemented in an off-hand manner typical of the military.
We had ANOTHER guy who's callsign was "Skin" because his last name was "FORE."
And as has been mentioned - you DO NOT get to choose your own callsign.