When I once pointed out a rather fetching female to him in a nightclub, he whined, "Cor, strike me, that's unnatural, innit?" Another time, I invited him to stop in a bar for a coffee, to which he responded, "Coffee? Nah, I don't drink coffee, mate, it's unnatural, innit, coffee?" His profuse perspiration I'd noted on a not particularly hot day was explained away with, "Yeah, I've always sweated a lot, it's unnatural, innit?" And so it went on.
Unnatural was applied to express size, degree, likes and dislikes, surprise... you name it, it was unnatural in some way. I thought it brilliant - unnaturally so, perhaps. There was an economy in his technique I found truly compelling. Apparently, so did his students, who followed his lead and could be heard describing the rain not as torrential, or heavy, but "unnatural-uh".
One day I met him at the school, and he was looking very sorry for himself. He'd just broken up with his Italian girlfriend. He didn't go into details, but I've often wondered whether he hadn't suggested they do something "unnatural" in the bedroom. Or summat.
I think this may well be his twin brother...