Also, it could have to do with the man's diet, as to whether or not the chick gets sick. For example, I have seen many, many Japanese 'gokkun' vids where the slut downs considerable amounts of cum at one sitting...10-20 loads at a time or more with no ill effects. Of course, we don't know what happens off screen 15 minutes later. So I recommend a diet of rice noodles and raw fish, pickled eel and sea cucumber. Then see if your woman can hold it down. It ought to work. I mean, if you can hold the sea cucumbers down, she should be able to hold the cum down! :D