This is so gross, but here goes.
When i was 19ish my boyfriend at the time had this odd little quirk where when he got REALLY horny, on rare occasions he would erm...squirt a little. Well he had never come from a blow job and I set out to make this happen. I was determined. One night I got him really close...he was extremely worked up...and then, SQUIRT. Right in my mouth. I was so fucking grossed out that he had just PEED IN MY MOUTH (though it didn't taste like anything), that I barfed all over his lap. Fail.