Not sure what the other guy means by “pop” but I suck on the clit while I finger the pussy. After a while the clit will swell. I like to lick it and suck on the clit till my girl cums. I’ve had her cum multiple times with that technique in one session. I also like to pull away from the clit while sucking on it for that extra tension. Being gentle or rough doing that just depends on what the girl is into.