One day while returning to my desk after a routine call, one of our female employees flagged me down and asked for help. 

"My floppy drive won't work, can you help me?" 

I told her I'd take a look and proceeded over to her machine, where I found shredded up clear plastic Baggie-like stuff hanging out of her 3.5" floppy drive. 

While I spent the next 20 minutes getting her disk out and digging out the plastic, I noticed two guys in the corner of the office trying awful hard to keep a straight face. 

Suspecting some mischief, I asked her how the plastic got into the drive. 

"Oh, you mean the condom!" 

"Condom???" 

"Yes, John & Dave over there told me to always put a condom on my disk before inserting it, to prevent catching viruses" 

By this point John & Dave were roaring and it was all I could do to keep from joining them. The "condom" turned out to be a standard 3.5" plastic sleeve. I delicately explained to her that a practical joke had been played and she shouldn't do that anymore, then she asked in a dead-serious voice: 

"Does that mean I don't have to stroke it ten times or blow on it either?"