Usually 5 minutes for the first one, then the rest kind of just roll over one after another. Recently I wondered how long it was gonna take from orgasm #1 to #2, so after I came from oral the first time, it was all of 10 strokes with his cock inside me before I was cumming again...it even surprised me. LOL My favorite is a squirting g-spot orgasms and I will keep cumming as long as my guy will keep going...10-20 isn't uncommon here, sometimes less if it's a quickie or if I switch to b/j, sometimes more if it's an all nighter.