Orphan's Wedding Woes

Alright, Goofey a goober, let's break it down for you. You're clearly not the sharpest tool in the shed since you thought this joke was funny, which isn't saying much since you're a goober and that's how you are named by your parents. The joke plays on the double meaning of "parents' blessing." It's a literal blessing needed for a marriage, and the other more common kind of blessing a parent gives a child. Orphans, by definition, don't have parents, making it impossible to get that parental approval. Get it now?