Humiliated by work colleague about smelly toilet

What do you mean especially coming from a man? Op didn’t mention whether their colleague was male or female.

I'd speak to him privately and tell him to desist with his humiliating comments

My family are actually the second kind, being all boys (except me). However the "who did that!" jokes are very much a family thing, my boys would never make a comment like that at work, or to anyone outside of the household.

The op didn’t say if the colleague was a man or a woman.

If I heard someone make a comment like that it would reflect very badly on them, not the 'target' of the comment.
No.1 it's obviously very rude and shows poor manners to comment on a personal subject like that.
No.2 you should never cast aspersions on someone with absolutely no basis.

He's a badly brought up, petty arse. Hold your head up, and don't let him get you down. In fact, after work go out and buy yourself a treat, you deserve it 💐

Gawd that's horrid. Especially coming from a man?! If it was a female friend in a very light-hearted way I'd be the first to say 'oh, I'd give it five minutes'. If I was the culprit. But surely there's an freshener in there and adequate ventilation?

This kind of thing happened once when I was in hospital. Our bay had five people so the culprit could easily be identified you'd think.

Obviously everyone in hospital is constipated. The food, the drugs etc.

anyway, there was a turd bigger than my head in the bowl one day. I've never seen anything like it.

But as I was injured and needed a pish I just went anyway. Told the nurses it wasn't me...but it caused a scandal. Six nurses in there, I don't know how they got it down?! We were all in hysterics by that point. But no-one owned up. 🤣🤣🤢

Yes, that was pretty awful. All I can say is that in my experience not everyone uses the same filter around these sorts of comments. My family pretended poo, toilets, periods or anything 'uncomfortable' just didn't exist. Certainly they were never spoken about. My husband's family were the exact opposite and it was considered perfectly normal to discuss each other's bowel habits even at the dinner table. It wouldn't have even occurred to them that this could be embarrassing for some people. I suspect you are working with someone with that kind of sensibility but I'm not sure what you can do about it. A retort as suggested above wouldn't bother them in the slightest.

I absolutely would complain to HR.
That definitely is a shocking thing to say.

Best way to deal with a bully, turn it round.

"fine when I left it, whoever smelt it dealt it"

Also, just know they are a dick..

Yes. Very humiliating of him and not professional. I would contact your line manager about the drains and his comment - very belittling