I think what he's saying is that his dick is so small that when he rapes his daughters for Jesus he doesn't do much physical damage, it's just purely mental and emotional trauma.
I'm pretty sure homie wasn't being deadass. He's calling Dad of the Year sussy for obsessing over his daughters' vaginas and how much sex he wants them to have with other men in the name of keeping their vaginas aesthetically pleasing to his eyes.
Are you perhaps on the spectrum? Taking jokes literally is something that tends to happen (not trying to be rude. I am autistic, and I do it often).
I think this person made a joke of the joke. Neurotypicals miss jokes often too. I have a very dry, sarcastic sense of humor and a lot of the time my weird jokes don't land. I also have a young daughter who may be on the spectrum. She's my little clone and so I'm reviewing a lot of my own eccentricities through a new lens. (All of this is a serious reply)