He just couldn’t help it.

Bayview police are investigating the case of a flasher who on Tuesday exposed himself to a woman.

The 38-year-old victim was walking in the 2000 block of Jerrold Street when the creep walked across the street toward her, police said. As he approached, he dropped his drawers and exposed himself.

He then grabbed himself and said, “I can’t help it,” while walking toward the victim, police said.

The woman told the creep she was going to call the police, which prompted him to flee in a white cargo van, police said.

He was described as a man aged 35 to 45, 6-foot-2 and about 180 pounds, wearing a white shirt and white pants, police said. As of Thursday, he had not been found.

rnagle@sfexaminer.com