Sugar Daddies: Sexy or Wrong?

So my boyfriend and I have been together for almost two years now, we're twenty and living together in an apartment. Our relationship is wonderful, we spend tons of time together, we have a little pup, we have a great romance and sex life. Recently I lost my job and while I've been searching for another one, an interesting dynamic has developed in our relationship: he gives me money, a lot. That he doesn't expect me to pay back. (He can do this in reasonable amounts because he works for his mom at a bodega and makes really good money.) I always thank him, usually with a sex act of his choosing, and tonight he sent me some spending money in exchange for some nude photos (he's out of town working with his mom). It doesn't really matter to me, but I was just curious about how y'all feel about "sugar daddy" type relationships. :)