Inscribe Magical tattoo - unlimted scolls?

[orphias]

A player in my campaign has picked up the inscribe magical tattoo feat. The way he wants to use it is as; Places a tattoo on his hand and then makes it like a scroll for spells. I would think reading the feat that each tattoo would be ONE spell with a number of charges. My player disagrees, and says that each tattoo could hold as many different spells as he wants with as many charges as he places in it per spell. Advice?

[DonDuckie]

Advice? Don't let him if you don't approve.

I've been reading up a bit on d20pfsrd and I assume it's the Spell Tattoo he wants, that's one tattoo which holds one spell like a scroll.

So for each item slot(head, neck and back are discouraged); he can inscribe one spell tattoo holding one spell, which disappears when he activates it. Activation requires looking at it and touching it.

[Quandary]

each tattoo is ONE instance of ONE spell, any more requires more tattoos/more body slots.
(tattoo body slots don't conflict with other worn items, of course, just with other tattoos)
if you want to flavor that as one big tattoo across different areas of the body, go ahead, but the mechanics are pretty simple.
each tattoo is like a scroll, and the tattoo disappears after you activate it. scrolls don't have multiple charges.
(the 'disappears after activated' part would make that a painful event even if it was allowed in the first place)
maybe your player took the feat misunderstanding how it worked. probably a learning experience on the value of communication.
if you're generous, you could allow him to use the re-training rules to retrain that feat to something else after a few levels
or when there is sufficient downtime in-game (assuming he's not happy with feat's actual functionality).