It depends who and where your smoking cause I have been with people who roll crazy ass cuban blunts in twos and you toke till you need to breath/ cough then pass. Then when that cuban is out the other cuban gets lit usualy imediatly. Then I have been with people who only toke one hit no bogarting their, and then I have been with girls with little lungs and they toke like 5 little hits for every one eleses one hit, theirs no science to it but I have been in some circles where not having 5 on it and fuckin up the rotation will get your ass beat.