I already tried the one from Walmart (Starters brand) and it didn't do much for me.. (close to no results wasn't worth the discomfort) but the Underworks one did make it at least ok looking even though it is indeed more painful (I live for pain, what can I do...)but then as I walked around a bit, I noticed an actual opening (not a defect) that's made for 'bathroom visits' as I was told when I asked about it and that's located literally RIGHT AT THE V. HOLE that I loathe.
When you mean a fly, a male would typically assume the front area for peeing right? I mean I could understand it if it was on the back but it's right down there as in, it exposes the very ugly sight.