Is it normal orgasmic spasm??

When I RP w/ a friend my legs go all numb, & sort of throb & pulse. I am in a wheelchair, the bottom ½ of my body is pretty much useless, the pain I usually get from it is like the end of the world, & has brought me to tears.

When I go all numb, there's no pain; it feels like there's a whirlwind whipping round my legs. You know the feeling you get when you need to do #2, like that. It's the best feeling ever; it makes me feel so good I could almost get up & walk. It makes me tip my head back, stretch my legs out, point my toes, squeal like a pig & groan out loud. I've told the person I do RP w/, who has nothing wrong w/ them who thinks it's hilarious.

What was/is it??