When I get back in bed with my first cup of the day, the kitty typically gets on my lap and takes a big SNIFF of it. I’ve never seen another animal be consistently interested like that- I like to imagine she’s a reincarnation who really enjoyed coffee in a past life, and this is a simple reminder of that 
Tax:
PostScript: saw a bunch of notifications and immediately assumed I said something ridiculous elsewhere lmao.
Haha I think it’s because of the high volatile compounds - particularly more of the nitrogen (ammonia?) adjacent ones. So it literally has the “essence of cat pee”.
Source: I booped between chem e/chem/food science studies back in the day and partially remember some things lol so who knows if that’s correct