"God forbid he hit a bong," Kutcher wrote on his Twitter account on Monday. "Go ask your 20-year-old kid what they did last weekend.
He added, "I'm not saying it was a smart move. But he doesn't need to be publicly outed for it. Whoever put the pic out is an a**!"
Phelps already issued a public apology saying: "I'm 23 years old and despite the successes I've had in the pool, I acted in a youthful and inappropriate way, not in a manner people have come to expect from me," he said.
"For this, I am sorry. I promise my fans and the public it will not happen again."
Not that we're condoning his behavior, but he's been so disciplined for so long, he just needed to be a kid and experiment. It's not like he's waking up and getting baked every morning.
He made a mistake and apologized for it, everyone needs to cut him some slack. What are your thoughts?