If you see some pretty young thing, say something.

That’s the mantra of Brian Robinson, a subterranean ­seducer who says the city’s subway system is the best place to score in the Big Apple.

“There’s always beautiful women down there — tons,” said Robinson, who used his own alleged triumphs to pen “How to Meet Women on the Subway,” out this week.

Robinson, 48, claims he has gone out with about 500 women since becoming a railway Romeo in 1999.

“My late Uncle Minor was a big womanizer — maybe that was part of my gift,” he said. “He got kicked out of nursing homes for pinching the nurses’ bottoms.”

Robinson’s time-tested approach is to pretend he’s lost and ask for directions.

“I would always say, ‘Is this local or express?’ and then say, ‘I hear an accent: Where are you from?’ It’s an awesome door-opener — 97 percent of all NYC women are from someplace else,” he said.



I would always say, ‘Is this local or express?’ and then say, ‘I hear an accent: Where are you from?’ It’s an awesome door-opener. - Brian Robinson

“No matter what place she says, say, ‘Wow, I’ve always wanted to visit your country/city, etc. . . . do you have ­e-mail?” Robinson suggested.

The trick, he says, is to have a quick conversation where you express interest in who she is and what she does — not trying to overtly hit on her. Then use the deadlines of the subway as an advantage: “I have to get off at the next stop and would love to continue this conversation. Can I get your e-mail address?”

The Post observed Robinson in action last week, and he was as smooth as advertised — getting digits or e-mails from four out of the five stunning straphangers he chatted up.

“Excuse me, does this train run along Sixth Avenue or Eighth Avenue?” he innocently asked Jasmine, 27.

“He was very engaging,” she said, rating Robinson’s technique a 7 out of 10. “He was persistent.”

“You need to just jump up and talk — it doesn’t hurt,” she continued. “At most you’ll get a bitch face.”

After a few minutes chatting on the F train, Jeanne Bucknam handed Robinson her card.

“He seemed like a nice enough person,” she said, saying he dived right in and asked what she did for a living.

And model Jerrica Patton liked that Robinson wasn’t an overbearing New Yorker.

“He was cordial,” she said. “He wasn’t aggressive.”

But there have been plenty of train wrecks, too.

“One time a woman reached into her purse and it looked like she had a little bottle of Mace,” Robinson recalled. “She said, ‘I don’t have time for this.’ She pulled it out — and then I got up and left.”

Birds and the B’s

Robinson’s tips for meeting women on the subway: