Can you make your sims get tattoos on Sims 3?

Answer 1

You cant, at all in sims 3, but in sims 1 and 2 you can get a tattoo if you are playing on xbox, but they arnt custom tattoos

with ambitions you can.go to cas and make a sim with them,go to the spa or th salon.

Answer 2

You can either download clothing with tattoos or get one of the E. packs that comes with them.
e.g. Sims 2 University.

Hope this helps !