Well the joke was that Annoying Orange sucks Putin's richard, and that's funny because sucking richard is humiliating. It's homophobic.
Not exactly, in fact, not at all.
It's more of a jab at someone who is constantly sucking up to someone. Sucking their richard, smelling their farts, licking their toes, whatever it is. It's got nothing to do with homoloveuality, because Annoying Orange's gender nor loveuality plays a part in it. The whole 'sucking richard' thing is basically "Person A is trying their best to please Person B (who happens to have a richard), no matter what it does to their image."
Which, some may interpret the joke as the "gayness tarnishing his image", but it really isn't. It's the fact that he would soil himself just to make someone else's experience better, at an attempt to being liked by said someone.
