Why do tattoos stay permanently? I thought we constantly formed new skin cells.

hi there is my biology is right lol it's only the top layer of our skin that changes and as tattoo's go into the second layer it stays there forever.

hope thats answers your question

Thanks for the info; it’s just something I wondered about.

Have a look here:

http://people.howstuffworks.com/tattoo.htm

Thats really cool and interesting,
cheers for that!

thanks, yea, really cool.