I had a client recently that smelled like sweaty ass paste. It wasn't really his fault, but I guess it was a long work day for him and I just didn't think of offering him a shower. It was such a huge turn off, but also, there wasn't any expectation to do anything either. He kept trying to initiate something and I didn't have the heart to tell him. Also, I hadn't seen him in 5 years and I hate it when old clients show up like that and assume sparks would fly or something.
The worst is when they have bits of toilet paper or even whole sheets of it stuck between their cheeks.
9/10 hotel clients will have that or smell like they just did #2.
It's extremely gross and rude because they had more than enough time to just jump in the shower by the time I tell them I am nearby and I have to walk my ass through the parking lot to their rooms, and we chat and I know they've been there for a while, not like they were in a meeting or serious phone call the whole time.