Tuck back or bulge

[krunkman1]

i think a seeing a big bulge in the front of a sexy ladies panties is always a cock stifening ass twitchingly sexy site, but theres alos something to be said about it being hidden til u get her back to the bedroom and she drops her panties and out pops that gorgeous cock all thick and veiny and ready to bust your asshole wide open

[Hourglass]

Bulge, definitely. Especially when dancing close with someone.

[NatasGato]

Seeing a bulge is always a hot and sexy turn on.
However it is certainly not something I would "require". I would be happy with what ever my lady wanted to do.
...As long as I got see one once in a while!