It’s a responsive witchcraft design curse. The frog will turn into a person of compatible social status to the kisser, and in the gender & physical form indicated in their preferences. Knowing Jerry, it’ll still be a frog.

Jerry would definitely be fine, but I think that frog probably only has frog coins. It’s a rare currency only accepted in select shops. And only one foreign country would even consider exchanging their legal tender for it, so it’s a bit of hassle unless Jerry collects coins. =p