i rather thrive on it. definitely one of my big turn ons, as long as it's honest and sincere. i don't need all that "you're the biggest in the world/i've ever seen!" stuff. no need to be comparative, just commenting on the size of my penis in and of itself...and what they'd like to do with it, how it feels inside of them, etc. that kind of stuff.
in some environments it can be a little embarrassing, but in the good way. i had an ex in college who went down on me really nicely before we went to see a movie. as we were standing outside waiting for our tickets, she blurted out "Well, that's just about the biggest thing i've ever had in my mouth." and of course, a family happened to be walking by just then. i was simultaneously flattered, aroused and utterly embarrassed. of course, my female friends i'm NOT involved with seem to love throwing out random comments about my penis in awkward social contexts. sadists, every one of them.
that said. feel free to comment on my pics (especially the ladies, lol).