Really funny jokes-Tried once

At a resort, a guy walks up to an older fellow who is sitting in the sun, sipping iced tea.
The young guy says, “Hey, how about a round of golf?
””Nah,” the older fellow replies, “tried it once, didn’t like it.”
“Well, how about a swim? It’ll be more refreshing that your iced tea there.”
“Nah,” the older fellow responds, “tried it once, didn’t like it.”
Young guy says, “Well, how about a game of tennis?””
Naw, tried it once and didn’t like it. But my son will be here soon. He’s usually up for a game or two.”
The younger guy replies, “Your only child I presume?”