What is the M-spot? by unknow.
There's actually a *pair* of these "spots." You stimulate them from outside the body, unlike the G-spot, which you get at from inside the vagina. These "M-spots" are on both men and women!
They're not easy to find, and you've got to already be somewhat sexually aroused, I think, or it won't feel like anything. I think you probably also have to be ticklish, but maybe not.
Stand up. Take your shirt and pants off. Put your hands on your hips. Now, feel how your hands are resting on a big "shelf" of bone? That's your pelvic bone. Grip that bone, and get a feel for the shape of it in that area. Now, concentrate on where the tips of your fingers are. Feel around that area. Relax your stomach muscles completely. (Try sitting down if it helps you relax that area.) If you have big hands, or a small waist, your fingertips are probably already on "the spots." Otherwise, move your hands forward, around towards the front of you a little bit, until you find the edge of that bone, on both sides. Now reach around that ridge of bone, pressing in on the sides of your tummy. Dig in with your fingertips. That's it! They're *right* on the edge of that bone, off the insides of it, not off the top of it. Your fingertips should be somewhere just below and to the sides of your belly-button.
I can't describe it any better than that. It's probably easier to find if your partner does the searching, instead. If you look for the spots yourself, you could be pressing right in them and not know it, because it's like trying to tickle yourself -- it just doesn't work.
Get naked with your partner, do some normal foreplay for a while, and get to where you're really ready for sex. Then have your partner stand behind you, and have him/her put their hands on your hips, as if you were, then proceed as given above. If they push and poke around in that area long enough, they're bound to find the spots. They might end up just tickling you to death, though. :-) (If it tickles, they're not pressing hard enough.)
When they do find your M-spots, you will KNOW IT. You will feel a fire light up inside you. Within moments, you will want to turn around and kiss your partner so hard they suffocate. It is VERY intense. It's kind of uncomfortable, at first, and you can't take it for very long.
If you're SO is "moving too slow" during foreplay, go for these spots. Things will speed up REAL fast.
Good luck...