"It could be me..."

One day while out with my husband, I noticed a convertible beside us with 4 people in it - 3 men and one lady. I was about to comment about it to my husband - more like "condemningly" asking: 

"What's that lady doing in the company of 3 men?"

What's your assignment?

No matter how attractive someone else's assignment may seem, it is not your assignment. 

What's wrong with the zipper?

Nothing.

With that answer I concluded that it means something's wrong with the "sipper".