The transformation from a guys casual facial expression to the
one he puts on right before he goes for the pink cave.
A mixture of a fake smile and complete
fear.
Fake smile because he promised he loved giving oral
complete
fear for what he might find and/or smell
Between bros and dudes it is often refered to as PLF
Example #1: She was smokin
hot braw, and I wanted her so bad so I just had to put my PLF on.
Example #2
Dan the virgin:
DUDE she gave me a blowjob, now I have to go down on her, but that place looks fucking scary.
Vinnie the experianced: Just get your Pussy licking face on and act like it is the best thing ever.