During orgasm, do you have involuntary vaginal muscle contractions, or can you contract voluntarily to make the guy feel good even if you do not have orgasm?
both. it happens during orgasm and it's possible without orgasm.
My pussy is a tight gripping orgasmic bliss maker
Kegel excercises are designed to work these very muscles. Read The Happy Hooker by Xaviera Hollander. She trained her vaginal muscles to hold a #2 pencil in her pussy for eight hours without wearing panties.
My first wife could jack or fuck your cock with just the muscles in her cunt. Just laying there with out moving she could make you cum, oh was that fine fucking. I tried to get my present wife to do that, she tried and was able to do a little but not like my first wife, What a slut she was.
Yes to both scenarios! Little surprised by the question, what happens when you orgasm then?
When I'm about the orgasm my pussy contracts so hard it forces out whatever is in there and I explode juices several feet at times. Cytherea style orgasms are the norm for me................