Dudes, watch out! the company that makes glow ink (for tattoos) has a disclaimer removing them from any responsobility. the reason for this is that there is a chemical in it that (which makes it glow) that can also be found in some types of house paints. it also has low level radioacivity, oh no!, that can cause cancer. just because the other guy hasn't gotten it, doesn't mean that it is safe, just like if you smoke, you aren't garenteed to get lung cancer, but how many people die each year from lung cancer. Also, this type of ink has not been used long enough to determine it's long term effects, and no research has been done as to any other long-term affects which it can have on your body.
but if you want one get one.