It's wrong to grope people without their permission.
Jake is dancing at a club with an attractive woman, and they are having good time.
Jake wants to make a move on the girl.
Jake gets the girl's number and asks her out on dates before making any moves.
Jake, while dancing close to the girl, runs his hang against her leg.
The girl becomes comfortable enough with Jake to be intimate with him.
The girl is offended by his actions and runs away from him.