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So here is my 2 cents worth on it. Semen is protien but it is also alot of fructose as well this is the food that allows the little swimmers to have energy to get to where they need to go. However most men only have about 2-3 tea spoons of semen when they ********* More than likely the amount is not going to cause you to dump, if anything it maybe one of those "foods" that your body either accepts or rejects.
I am a sexologist and have 10 days to my open RNY. I asked my doctor if Oral sex would even be possible while I recoop, and he said as long as I am not excerting myself, that if I wanted a little ******* that it would be ok.