my boyfriend and I goes clubbing with a group of very close friends. often we separated to dance with our single friends. every time we do this i realized the girls are grinding on my boyfriend. i confronted him and he said yah but that's how you dance to hip hop. i said no its not as long as her ass is on your thing. he said well its the degree in how far she backs up then I can consider it as "grinding". I want to hear this from someone who goes clubbing often and is familiar with this type of dancing. put into consideration that we are not single.