I think that you have to call this. Sure he's a loose player and could have the 23 of spades and you're beat, but you could also have 23 of diamonds and have absolutely nothing.
Plus, based on the amount of money that is likely in the pot, I think that you have to call - unless of course this is some RIDICULOUSLY sized bet that is a couple times the size of the pot - then you have to think about laying it down.
No doubt in my mind that I would call though |