You 'boys' are commenting on her UKE, right?
Now, clothing choices aside, have you ever read through comments made to attractive ladies on their videos? Most seem to note what the commenter wants to 'do' to the lady as opposed to commenting on her uke style. I feel that many ladies that play ukes try to be a bit more conservative so that they can get comments on their 'playing', and not immature, demeaning remarks about the womanly figure which happens to be prominent at uke playing level, or her pretty face.
I, myself, have gotten remarks like 'i would tap that' and such.... It's not actually all that flattering, guys. Keep your pants on, use the brain in your head instead of the ones in your pants, and enjoy the uke and the fact that ladies play them too.
Remember, that despite the coldness of the Internet, every uke playing, video making lady is someone's daughter. I hope that every man has a pretty daughter someday... It likely puts everything into perspective ;-)
