Things only a car guy would do..

I had a friend over at the shop and I started to open a bottle of flavored water that I had started to drink the week before. I think it was raspberry flavored. Before I swallowed it down, I put my nose to the bottle and took a sniff. My friend asked why I would need to smell the water before I would drink it, water doesn't go bad does it? I said that I wasn't sure but I might have put transmission fluid in the bottle for some reason and the water kind of looked like tranny fluid so I had to smell it to be sure. I thought later that only us car guys would need to do something like this. {yeah I'm getting older too so the "old-timers" is setting in a bit}. Just wondering if any body out there had any funny car guy stories like this. Enjoy!