Another thought on a more practical note. If you hold on to the base of the penis when you are giving head, you will be able to tell when your H is about to come. There will be a sort of pulse you can feel. I kind of imagine it as the elevator pausing at basement level before it turns into a rocket and blasts off for the penthouse. If you want to avoid swallowing, you could simply slip it out of your mouth at this point. If you want to try and give your H a multiple orgasm, this is the point at which you should apply light pressure to make the elevator stop at floor 2 and go back down to the basement again before heading for the penthouse.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver
