Guess the 90’s Throwback

Can you guess the 90's song this video was from? It was a #1 song for this R&B group in 1997. The lyrics are actually quite dirty... It has to do with a "reaction" this guy has when a girl is grinding on him at a nightclub. Okay, enough hints. Now guess the 90's throwback and listen for it to play during the Back in the Day Cafe on The Q!