As long as you like em man, I just can't stand seeing people going to a parlour and getting something just because it looks cool, just leads to regrets later in life, in my opinion.
And as for the meaning of the one on my back, it was kind of arevelation that I stumbled upon, tripping balls on mushrooms at an Ozzy concert
Basically it represents how every person can build off the energies of one another, and the energies of the earth, life, and the universe in general. Looking a little deeper into it, the two colours represent man and woman, and how their lifes are intertwined, how they build off of each other, and how it keeps our species alive and thriving.