Back when I went to the office, I have had similar experiences. Once you work with ppl so long, you kinda get a sense of their schedule which is fucking weird but w/e. People are creatures of habit.
There’s one guy I work with, older gentleman and definitely not a great diet. Anyways, I’ve worked in the same office with him going on 8 years. I’ve never seen him use the urinal. Not once. Every time he goes pee, he also takes a shit. I know this because he wears the same shitty white New Balances everyday. And his shits are explosive. He lets them fucking rip, like farts I didn’t even know what humanly possible. He must shit at work 3-4 times a day I bet. And who knows what he does at home.
I agree, it’s weird and not normal. Personally, I’m a once in the AM type of guy after some coffee. 5 minutes tops. I’ve never understood sitting on the toilet, stewing over literal shit and scrolling through twitter or the news