I wouldn't consider doing that in front of a woman, nor had I actually considered that ANY guy would do that. Apparently, though, something good has come of these guys doing this, or else why would they continue to do it?

EXHIBICIONISM, known variously as flashing, apodysophilia and Lady Godiva syndrome,[1] is the psychological need and pattern of behavior involving the exposure of parts of the body to another person with a tendency toward an extravagant, usually at least partially sexually inspired behavior to attract the attention of another in an open display of bare "private parts" — i.e., parts of the human body which would otherwise be left covered under clothing in nearly all other cultural circumstances. Some researchers have claimed that telephone scatalogia is a variant of exhibitionism.[2][3]

A research team asked a sample of 185 exhibitionists, “How would you have preferred a person to react if you were to expose your privates to him or her?” The most common response was “Would want to have sexual intercourse” (35.1%), followed by “No reaction necessary at all” (19.5%), “To show their privates also” (15.1%), “Admiration” (14.1%), and “Any reaction” (11.9%). Only very few exhibitionists chose “Anger and disgust” (3.8%) or “Fear” (0.5).[4]

These guys are so disgusting and crude. I can't imagine what makes them think it's ok.