Until you age.
While your skin is full of collagen. While everything is stretched and taut.
After that, no, it isn't.
It's another of the lack of perception of youth of the consequences of aging. Trying to live as if they will be young forever. Newsflash, you don't. And time fucking flies. One day you are 35, at the peak of your power, all of a sudden you are 60 and can barely move your legs and you haven't seen your dick in 20 years.
If you HAVE to ink, be smart about it, plan them for when you're old, because you'll be old for a longer time than you'll be young. Or, you know, just say NO.
Peace