i agree with steph myself i find i usually come quick if i am super turned on or havnt had sex in a few days
so to get around this i find that after a little breather i can go for another swing and its usually mrs kinky that ends up begging me to cum
and if you are with a friend along with youre s/o well mrs kinky loves being licked and nibbled after she has been cum in so .......my advice is just go with the flow and then go again