A rather
complicated advanced
blow job technique. The recipient stands at the side of the bed. You lay on your back with your head hanging a bit over the side. The bed has to be high enough so that your
mouth is as high as his
erection.
The bend in your neck will allow for maximum penetration of the mouth, but you will have far less control over the actual act of the blow job.
I'm warning you, this will not work on your futon.