He just heard that old Sam Cook song, Shake.
it means by his standards you are nervously tense and boringly conventional.
it means he likes her.
Probably, If you think she meant it.
When a boy penis starts shaking, it means it got aroused when you lean to it. It excites him that his penis started to moves, getting bigger, longer and harder. When you hold his penis actually, maybe, your boyfriend will release his semen untimely.
It mean's, she trust's you more than she trust's her boyfriend, or because she is shy around her boyfriend and she doesn't know how he'll react.
There is an earthquake
Sounds like you need to get a new boyfriend.
some people don't mean any thing by it ,or sometimes they like you or your boyfriend
You need a boyfriend in life.
It's a hug, isn't it?
Shaking.
not all women do. some women sleep around when they have a boyfriend to get something that her boyfriend isn't providing her. it could also mean that she's not looking for a serious relationship.