So, you know your in trouble when you head to the bathroom in a gay bar, and the doors are marked "XX" & "XY"!  I'm sorry, but my science class was YEARS ago, and I couldn't remember which was which!!  I went back out & asked my nephew, who is some kind of medical engineer, but then I forgot what he said by the time I got to the bathroom!  Of course, I first picked the wrong one and almost walked into a room full of urinals!!  Once I did find the ladies room, the walls were decorated with very interesting artwork, if you know what I mean!!  Made me want to go back!!!