And the boner may dissipate (at least a little bit) as we do.
But the sensation of the flow feels good. There's a sense of a tingling, especially in the glans. For me, at least, it feels damn nice. The relieving of the extreme fullness of the bladder gives way to the sensitivity along the shaft and into the head. Clearing and shaking off the last drop many times finds the hardness returning.
Then, the enjoyment of going back to the bed - cock bouncing and waving - leads me to lie on my stomach and thrust against the mattress - even if it's only for a few moments...
...as I drift back to sleep.
I don't need to shoot a load, I just love to feel the hardness, that fullness, of my cock.
For as much trouble as they may give us at times,
one of the greatest pleasures in a man's life is a boner.