If I'm just giving head, I always swallow because generally the head is too far into my mouth for anything other than swallowing to be natural. Basically, I don't even think about it.
If I'm giving head combined with a hand-job, I might not swallow because if my head is facing down, some ends up in your mouth, but some dribbles out. Actually, I sometimes like playing porn star and doing the trick where I make a point of catching it with my mouth a couple inches away from the head. Kind of like drinking from a water fountain. I find it erotic and amusing at the same time.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver
