I have noticed that when my cat (neutered male aged 1) is being happy and affectionate, he gets a really whiffy backside. I know this is probably his anal glands working overtime, and I've not seen anything to indicate a problem there (no soreness, licking, etc). But hoo boy does it pong! Once or twice he's left a tiny smear on the duvet cover, when he's been having fuss on the bed (yuk).
Has anyone else experienced this with their cat, and did they grow out of it? (She says hopefully.)
Picture of the handsome little varmint, just because.