Has anyone ever done this when climaxing?

Okay, so it had been a while since the last time I had sex. About 6 months to be exact. Every time I got ready to climax he told me that I was pushing him out. I didn't know what he meant at first. Then I felt it, I got real right and it was practically squeezing him until it pushed him out of me. No one had ever told me that I did this before, so I don't know if it's new or not.