I was just now helping my co-worker print something (personal), and trying to be careful not to cough or breathe on her, but then I put my hand down on her mouse, and felt something sticky on the left mouse button.
"What is that?" I said.
"What?" she asked.
"There's something sticky on your mouse."
"Oh, it's probably just coke," she said.
"What do you mean, 'probably'?" I thought.
And then I felt that feeling of absolute revulsion that comes over you sometimes, and I went back to my cubicle and practically emersed my hands in hand sanitizer.
She may find an anonymous gift of Lysol disinfectant wipes on her desk later today.