Grinding / dry humping

Is it just me or okay , so when me and my boyfriend dry hump and I'm laying on him grinding up and down if we do it for a good couple of minutes right at the and I will go supper fast and for about 10 seconds I will have the best feeling in my vagina and it feels like an orgasmm but I don't really orgasm does this happen to anyone else or ?? 💗💗