Seems to be a new thing - last couple of days - but my male car suddenly seems to be humping just before he settles down.. so he sort of does a very quick jiggy thing while he is paddling with his paws.. He is also licking his bits a lot more than normal (or maybe not and I am just noticing it more because of the humping)
Could this be worms? I was assured he'd been wormed just before he joined our family about 2 months ago but this is the only thing I can think it to be? And dogs do that weird bum dragging thing so wondered if this was the feline equivalent 
He is neutered btw so hope he hasn't just morphed into a frisky bugger!