The dude has to be well into his 40's by now, surely? Let's say he was 18 in 1978 when the Misfits first started, that would make him at least 42.
Bitch Tits or not, he's not in bad shape for a guy of his age. I think he's a bit of a short-arse (about 5'4"), so maybe that doesn't help the overall proportion?