JUST FYI, on a tshirt ride last summer I was behind a woman whose shorts had seen maybe a season too much of riding. They were a little threadbare and you could see through them. SEE THROUGH SPANDEX. I could see her crack clear as day.
SO danger. and yes, look at yourself in a mirror from behind in bright light every once in a while.
I COULD SEE HER CRACK! AAAAAHHH