I remember a phrase from a story once, that I won't forget. I think the female was riding him and when she orgasmed, she called it "a screaming spiral of 'fuck', right up my spine."
With my current boyfriend, I can feel perfectly when he cums in my vagina. It feels like a little hit or sort of, and I Love it because it is then when he moves better and makes me cum too...yum!!
I have had a few partners, but I have only ever felt this sensation with two. One was incredibly (unfortunately even) small and the other is VERY well endowed so I'm not so sure it has to do with length... but I could be wrong.
And as for the condom question, yes I can feel it both with and without.
Ling
I can usually feel it. Sometimes more noticable than others. Maybe that's a volume thing. Most times can definitely feel extra warmth but the main give away for me is that I can feel I am wetter and more slippery inside. Cock twitching I only notice if he is barely moving or stopped inside me while he cums. If he is vigorous there is too much movement for me to feel pulses.
I can feel it because I enjoy the sensation and I look forward to it. If you aren't looking forward to it you might not notice it at all. That's my opinion....lol.
My old girlfriend told me that she loved the feeling of when I came in her. She said it would cause her to have an even bigger orgasm.
Depends on the guy, totally. Sometimes I can feel it swell, and sometimes I can feel myself getting flooded with warmth, but othertimes I just know it happened because of everything else that happens when he cums.
I feel it too!! It's like his dick swells and then warmness of liquids joining together.
I can absolutely feel it. he tenses up and his muscles become rigid. Apart from the concentrated look on his face. And then of course there's the stream of cum hitting me square in the face, traveling down my throat,or up my pussy.
i can diffently feel it!!!
"Haters make me FAMOUS!!!"
Sassy
I can feel it and especially if I've cum a lot first the more I cum the tighter the pussy gets. Love feeling it throb and cum in my mouth to.
Bunny12

Bunny Rabbits cute and fuzzy they want to love you but they have razor sharp teeth - don't piss them off! My wife tells me she can usually feel me swell inside her (unless she is orgasming at the same time) but very sleldom actually feels my semen hitting inside her. This is a disappointment to me because I would love for her to feel my semen blasting up against her cervix.
i dont feel the ejaculation itself but i feel it getting suddenly harder and more swollen just before he shoots
There should be a option to answer "sometimes".
Oh yes, and it feels so very good
Oh yes I feel it, sometimes I like a guy to stop thrusting to feel him pulse and his cum shooting my insides
I can feel it if I'm not cumming at the same time. Also if he slows his thrusting down, I can feel him swell then suddenly his cock erupts. I can feel him semen spurting inside. That always throws me into a tremendous orgasm. Oh so good!
I said yes, but its really a "sometimes, not all the time" type of thing. All depends on how "things" are down where the action is -- if he's big, then I can definitely feel him jamming up against my cervix, but don't always feel the sperm jet. (I'm small framed, so what's big for me might not be for other girls). I can definitely feel the heat and wetness being squeezed out by his cock occupying so much volume ...
If he's 6 or 7 inches, then yes, I can sometimes feel the jet - I can feel the heat. And I can feel the fast leakage if he shoots a lot of cum...
If he's 5 inches - almost always yes -- I can feel the jet splashing against my cervix and vaginal walls.
I have one friend - he is 4 inches fully erect - but he shoots his cum (lots of cum, always) like five feet in a handjob - I always feel him squirting inside. Maybe the nerve endings close to the outside of my vagina are more sensitive - who knows. (and this guy is actually a lot of fun to blow, too. )