I like to self-pleasure from time to time and I noticed something After a bit of rubbing I kinda rock forward and it feels like I'm tightening up Anyone know why that is?

Answer 1

It's called Orgasm. Orgasm is the release of sensation to some parts of your brain, which is highly responsible for expiercing pleasure.

When a guy/girl starts touching you, you start getting these feelings that you may like. When you like the feelings your partner is giving you, your body forces you to get closer with your partner. This is natural, but sometimes you have to be aware and make sure your doing the right thing. You may experience to much pleasure, which may be harmful. Remember, kissing, holding hands, touching and masturbation are all safe.

Just always think twice before you get to close; you do not want to suffer the consequences after you've made the mistake.