from personal experience, there is from self sucking which is best, to almost self sucking just aiming for the open mouth. then there is cumming on a friends dick then sucking it off. then it's nice to ask him to use his dick to puch it into your throat.
When I was younger I would throw my legs over my head and jerk off right in my mouth. When I was about 16 I was in that position and was coming directly into my mouth forgot to lock my bedroom door and my dad walked in.