I think road cyclists are generally an intelligent breed, relatively speaking, and there-fore are less likely to suffer from self-esteem problems and the need to project a "tough guy" image. I think tattoos (on men or women) broadcast, in no uncertain terms, that the individual is a fatalist and a defeatist.
It is kind of an anti-education or anti-intellectual mindset that spawns such self-destruction. Body modification of any sort says that the individual has a certain amount of hatred for oneself or for life-in-general.
I think that road cyclists are generally affable and life-affirming. No matter what has happened in my life, I have not succumbed to self-loathing. When I see a tattoo, I immediately think, "This person has issues".