IMO, the weird part is taking your glasses off in the first place, especially when you apparently need them for desk work. It's not like they're coming in from outside or were taking a shower, they were clearly already sitting at the desk in working position.
Some people don't wear their glasses full-time. Could be they only usually use it for computer work and forgot to put them on until some eye strain set in.
I can't conceive of seeing... anything without my glasses, but some do.
I hate when people ask me to pass them their glasses. They're putting the responsibility of not smudging their glasses on me. Sure I can do it, but there is always that small possibility of failure.
If the glasses are folded up there is that moment of trying to decide how to grab the glasses. Do I grab them by the bridge bit that sits on their nose, or by the bits that hook over the ears? Surely it's too risky to grab by the frame around the glasses.. if they exist.
My glasses don't have a frame, but there's no chance that they'll break from holding them from the sides of the glasses. Though it does increase the risk of smudging them.