It’s a new crack epidemic.

The nudist caught riding an E train on Thursday was spotted three weeks earlier dressed in the same outfit — nothing but sneakers — resting his bare butt on a bench in a city park.

Melanie Lazenby couldn’t believe her eyes when she picked up Saturday’s Post featuring a photo of a naked rider on the front page — and recognized him from the park.

The man “walked up, removed all of his clothes and put them in his bag and sat down and put his headphones on,” the Realtor recalled.

She Instagrammed a pic of him. Same sneakers and socks. Same tattoos. But, she noted, “he had a haircut since then.”

She said it was another reason to love being a New Yorker.

“I don’t mind seeing amusing things from time to time. He was completely harmless,’’ she said. “He was in his own world. People would walk by and take pictures, and he never made eye contact.”

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