Just read the story 'Did You Cum' and it reminded me of the first and only time I heard these words many years ago.
When I heard this question asked the first (and I think the only) time, I was around 19 or 20 years old. I was in the military and was stationed in the Far East. I had a girlfriend there and was in her small apartment. At the time, I had never done anything sexual with a girl. We ended up laying in her bed kissing. After doing this for awhile, it had made me very aroused and I had a big hard on going in my pants. Then, for the first time, things happened.
I was on my back and my girlfriend was on her side. This was when I felt it. For the first time, a girl was touching and rubbing on my cock thru my pants. It felt so good having a girl touching me there. With the ice broken, I reached under a girl's dress for my very first time feeling the softness of her legs and touching her pussy through her panties. This was all it took. I blew in my pants with a literal explosion of cum. It had been months since I'd last gotten off at the time.
Soon after this, my girlfriend reached her hand down from the top of my pants towards my cock. Of course, she immediately hit the cum with her hand before she could get to my cock. She pulled her hand out and looked at it and it was then that she asked 'Did you cum'? It was kind of a foolish question. Her hand was covered with a wet slimy liquid and what else could it be. I just laid there looking at her wanting things to continue. What I was feeling all over certainly felt good especially what I was feeling under her dress. But, she got up and went to wash the cum off her hand. That was it for that evening. But, the next evening was a totally different story. Being it didn't involve masturbation, we'll leave it at that.