wanting to know what was going on here....

But I have googled and googled and can't find a answer AT ALL. 

So me and my boyfriend were having sex one night and we were doing it doggy style, of course I have to play with the clit a little to be able to orgasm... WELL as I had my there I felt this liquid squirting on my hand (and it wasn't mine cause I wasn't even anywhere near climax yet) but pretty sure it was coming from him. It was coming from above and squirting on my hand and can't find a logical explanation for it.. 

Would love to know if this has happened to any other person or guy cause if it had I'd love to know how to do it again if it did come from my boyfriend...thanks!