Is it normal spunk in my own mouth

Hi this is something I really want to do I've read there's a couple over ways to do it in a cup, in your hand, but the only one that turns me on most is wen my legs are behind my head, but wen I'm doing it this way it happens everytime, I got every intension of shooting it in my mouth, but instead blow it over my face instead, I really want to do it but my loads are huge I really don't fancy swallowing tha much for my first time, couple ov weeks down the line maybe, so please any usefull tips I would be grateful thanks