What kind of muscular contractions occur in orgasms?

Question

What muscles, how do they, and why does it give a sense of pleasure?

Answer 1

The pelvic floor muscle is doing the bulk of the contractions during an orgasm. It's called the pubococcygeus muscle, or PC muscle for short (you can see why people rather call it the short name). It helps you start and stop peeing for both men and women. For men, it is the muscle pushing semen through your plumbing system and out the penis. For women, it does other things.

As far as pleasure goes, it's in your brain. Brains are wired to interpret orgasms as extremely pleasurable. I suppose Mother nature knew that the human race would probably die out unless she made having orgasms (and thereby getting women pregnant) extremely pleasurable. Your brain also releases hormones to give you a sense of well-being, contentment, and bond to your mate. Helps with pair bonding and creating a nurturing environment for a child to come into the world supported by pair-bonded adults.

Answer 2

Pleasure and enjoyment starts with erection and increases with the stimulation of the penis until the apex ending then with the final ejaculation. During the orgasm Sphincter Urethra Muscle and the Perineal Muscle mainly work.
Any stimulus, signal and command is managed by brain.
Anyway, the pleasure comes through the sensuous penis cells reaching the pinnacle during the orgasm.

Answer 3

The pleasure is wired into you so that you'll want to have sex and make more of you. The important contractions are around your testicles and prostate gland, I guess, to expel semen. Every other muscle in your body contacts at the same time just for the sheer joy of it.