Discovering my nipples

I'm 49 years old and you wouldn't expect that I'd be discovering new things about my body, but recently I realized that my nipples get very aroused from pinching. If I cross my arms over my chest so the right hand pinches the left nipple and the left hand pinches the right, it's a huge turn on. I feel a sexual energy flowing from my chest right down to my cock. With just a few minutes of touching, pinching and rolling of my nipples, my cock begins to grow stiffer and stiffer. I can get fully-hard by doing this and the pre-cum really oozes out (of my cock) too.

I Googled it and while not all men get the same pleasure from their nipples, many of them do. Anybody here play with their nipples?