Thinking of getting a few pairs of this. I have never owned a pair of underwear with the y-front. I dont have a clue even how the fly functions. I know on a pair of hanes or fruit of the looms the fly is worthless. How is it on a y front? I know with an H-Front that Jockey produces I use it all the time. Just wanted to know how do these stack up and where is the best place to get them?