Buttocks clenched while masturbating

I have always been aware that when I masturbate I clench my buttocks, especially when I orgasm. But recently while reviewing some old videos I have I saw one from the old Kara Prepare Yourself site from Clare Fonda. Parenthetically, it is very clear watching Ms Fonda that she is a woman who loves all things anal. That's my guess anyway. Anyhow, this particular video is of a porn star/spanko who I think is Madison Young, but I may have that wrong. I have seen her spanked by Dallas and she can take quite a paddling. But in this Clare Fonda vid, she has her rectal temp taken along with some other girl that I can't name. After the thermometer comes out, the girls are directed into the bathroom to masturbate, facing away from the camera. Madison has quite a nice bottom and as her masturbation moves to its conclusion she tightens her buttocks into quite a clench. I'd never paid much attention to this before but seeing it on an attractive behind was very erotic to me. Any other thoughts or observations on the matter?

My butt always does I guess it a reaction during a orgasm ....

I would say that I tend to naturally clinch too. My anus will be part of the contractions I have when I start ejaculating. That's the way my anatomy works and I am probably no different than other men.

Sometimes I like to do something opposing to the contractions as my orgasm starts. I actually push out (like you are trying to expel an enema) so I am actually pushing against the contractions. This produces a different effect than the clinch and feels great.

So the clinch or the push feels great- of course it does it is an orgasm. But I think it is fun to mix it up a little bit from time to time.

If you can consciously resist the urge to clench, you might be able to delay your orgasm. You WILL clench when you cum.

The muscles of the buttocks, as well as the pelvic muscles, naturally contract during orgasm.

I think it's somewhat involuntary for males as there is so much correlation between the prostate and the sphincter.

That's what causes the intense thrill ride when time your orgasm to coincide with the expulsion of a high volume enema. Involuntary stop-go-stop-go-stop-go... What a rush!

It happens to me when I cum. I always thought clenching was a natural part of the orgasm process. What's fun is when there's an object in my rectum - finger, penis, dildo at orgasm and i clench around it involuntarily. What makes the orgasm more intense is not inserting the object further, but rather withdrawing is slowly. It's impossible to hold back cumming under those circumstances and the first shot is quite powerful, at least for me.

Related phenomenon: I've had partners who spread their legs wide apart at orgasm, and others who clench their legs together tightly. Not sure if there's any particular reason for the difference.

The anus contracts rhythmically in both men and women at the time of orgasm. That's how you can tell if she faked it or not!

If you can consciously resist the urge to clench, you might be able to delay your orgasm.

On the other end of that spectrum, I remember when I was in my mid teens one of my mutual masturbation buddies told me, "If you're trying to cum and it won't come out, clench up your butt cheeks. That usually works for me."

It was a good technique for speeding up a whack off session if you were afraid someone's mom were about to intrude.

Let me try to restate what I was thinking when I originally wrote this post. And, I admit I did not get it into words in my original post. I have never been one to enjoy watching other people (male or female) masturbate. It's just not a turn on for me. But the appearance of human buttocks comes as close as anything on earth to obsessing me. Clothed (in tight jeans preferably) or bared, male or female (tho much more so the latter), standing up or bent over...I cannot not look. What I was struck by with the vid of the clenched buttocks of a masturbating, young female was that I found something sensual there I had not appreciated before. Actually the posts here have been on point and enjoyable. I just thought I'd expand on what started me on this. Thanks, all