all of your body working espicially your mind and sexual gland . and in the end all of the body energy spend to ejaculate.
You start to tremble because your body is most likely in an orgasm and your body is under extreme pleasure. It only happens during sex or maybe even foreplay. Your body is undergoing the results of sex, and those are the natural effects of it. It usually means your enjoying it!
they have sex
When you get your period, your body is letting you know you can have sex.
Your mum has sex with me.
Nothing 'happens' when you get horny during your period - you are simply horny. It's normal to have increased sex drive during menstruation, you can go with it and enjoy pleasurable sex or masturbation, or you can just ignore it and get on with your life.
You die
During sex, the body is physically active and the heart rate increases, leading to elevated body temperature. The release of hormones, like adrenaline and endorphins, can also contribute to feeling hot or flushed during and after sex.
its get all messed up
you get hard
Ejaculation occurs with a sexual climax during sex or masturbation or during so called "wet dreams"
its normal you have nothing to worry about it just means it was too rough it happens to me too when i masturbate but not during sex
When having sex, the muscles of the body tend to tense up. This tenseness can lead to cramps.