To save everyone the trouble of reading a lot to learn a little: "man" is a verb in that sentence.
Though if I wanted to be clever I could hammer that into less garden-pathy sentence as follows:
"In my will, I left everything to the one who could use it best. I gave the boy the legos. I gave the girl the dollhouse. I gave the mother the kitchen set. The father the hunting rifle. The bachelor the suit. The old man the boat."
Though if I wanted to be clever I could hammer that into less garden-pathy sentence as follows:
"In my will, I left everything to the one who could use it best. I gave the boy the legos. I gave the girl the dollhouse. I gave the mother the kitchen set. The father the hunting rifle. The bachelor the suit. The old man the boat."