Because people with tattoos are mentally ill?
yes..because who in their right mind puts paint on their body that can`t be washed away and has no beneficial funktion beeing there and on top of that pay`s money for it? if you feel safe and secure you would never even think of doing something like that.
as for me i buy a t.shirt instead. cheaper,less painfull and i can change motif whenever i want = smarter.