I am in my 40s and have 8 tats, including one that is large and intricate enough that it took me a year to get it done; with that said, none of them can be seen until I remove my underwear ie when dressed for work, be it in a shirt and shorts that I wore for tours, flight suit for HEMS, shirt and trousers for govt work, etc nobody ever knew.
Tats are about self-expression, and while I disagree with some of the comments above about following rules and enjoying pain, I don't disagree that tats are looked down upon by many (including myself) when I see them on people who are obviously wearing them as an "in your face" manner. It's all about how you present yourself, as has been mentioned already, and doing something that shows that you have done this to show it off to the world instead of for your own sense of what you want your body to look like in private is NOT in keeping with ideals of professionalism, maturity or dependability.
My opinion, YMMV.
