The most I've had is three guys in one evening on several occasions. (I've only had sex with four guys in my life.) That's before Lora got divorced and Walter stilled played with us; now it's just hubby and Red. I have done it serially and DP, but don't like anything in my mouth while I'm trying to orgasm - I can't breathe. Since Clair and Lora were there I didn't always get freshies from all the guys. That makes a difference, it takes a guy longer to cum the second or third time, but that can be a good thing. Not as much semen to enjoy though.