There’s always something better.” “If you had a reservation somewhere and then a table at Per Se opened up, you’d want to go there,” Alex offers.“Guys view everything as a competition,” he elaborates with his deep, reassuring voice. ” With these dating apps, he says, “you’re always sort of prowling.You could talk to two or three girls at a bar and pick the best one, or you can swipe a couple hundred people a day—the sample size is so much larger. Crew; senior at Parsons; junior at Pace; works in finance …“I can go on my phone right now and no doubt I can find someone I can have sex with this evening, probably before midnight.”And is this “good for women”?

In February, one study reported there were nearly 100 million people—perhaps 50 million on Tinder alone—using their phones as a sort of all-day, every-day, handheld singles club, where they might find a sex partner as easily as they’d find a cheap flight to Florida.

“It’s like ordering Seamless,” says Dan, the investment banker, referring to the online food-delivery service.

If I were ever in a court of law I could point to the transcript.” But something about the whole scenario seems to bother him, despite all his mild-mannered bravado.

“I think to an extent it is, like, sinister,” he says, “ ‘cause I know that the average girl will think that there’s a chance that she can turn the tables.

“They’ll tell you, ‘Come over and sit on my face,’ ” says her friend, Ashley, 19.

Mobile dating went mainstream about five years ago; by 2012 it was overtaking online dating.

As the polar ice caps melt and the earth churns through the Sixth Extinction, another unprecedented phenomenon is taking place, in the realm of sex.

Hookup culture, which has been percolating for about a hundred years, has collided with dating apps, which have acted like a wayward meteor on the now dinosaur-like rituals of courtship.

It’s a balmy night in Manhattan’s financial district, and at a sports bar called Stout, everyone is Tindering.

The tables are filled with young women and men who’ve been chasing money and deals on Wall Street all day, and now they’re out looking for hookups.

“But you’re ordering a person.”The comparison to online shopping seems an apt one.