Ejaculated soon after insertion

Yesterday I hadn't had a BM for a couple of days, so a glycerin suppository was self inserted. I got the familiar feeling as it slid up my rectum. I became aroused very quickly and as it started to melt it seemed to stimulate my prostate gland and I was soon pumping cum out. Has this happened to anyone else?

No, but I kinda wish it would. I’d enjoy that quite a bit and would likely go through a jar of suppositories pretty quickly.