I'm curious if that relationship between sunscreen and cancer has more to do with the time spent in the sun by those who wear it.

(I.E. the difference in chances of getting cancer for a person who doesn't wear it and doesn't get in the sun much vs a person who wears it but spends all day in the sun)

The tanline on my legs bothers me more, its particularly well defined since I own 1 pair of cycling shorts.