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

Dating apps are the free-market economy come to sex. tracking to show whether matches have recently “crossed paths,” use it too.

In fact, they can remember whom Alex has slept with in the past week more readily than he can.“Brittany, Morgan, Amber,” Marty says, counting on his fingers. Alex, his friends agree, is a Tinder King, a young man of such deft “text game”—“That’s the ability to actually convince someone to do something over text,” Marty explains—that he is able to entice young women into his bed on the basis of a few text exchanges, while letting them know up front he is not interested in having a relationship.“How does he ”But Marty, who prefers Hinge to Tinder (“Hinge is my thing”), is no slouch at “racking up girls.” He says he’s slept with 30 to 40 women in the last year: “I sort of play that I could be a boyfriend kind of guy,” in order to win them over, “but then they start wanting me to more …

“It’s changing so much about the way we act both romantically and sexually,” Garcia says.

“It is unprecedented from an evolutionary standpoint.” As soon as people could go online they were using it as a way to find partners to date and have sex with.

“We are in uncharted territory” when it comes to Tinder et al., says Justin Garcia, a research scientist at Indiana University’s Kinsey Institute for Research in Sex, Gender, and Reproduction.

“There have been two major transitions” in heterosexual mating “in the last four million years,” he says.

“The first was around 10,000 to 15,000 years ago, in the agricultural revolution, when we became less migratory and more settled,” leading to the establishment of marriage as a cultural contract.

“And the second major transition is with the rise of the Internet.”People used to meet their partners through proximity, through family and friends, but now Internet meeting is surpassing every other form.

Some, like writer Hanna Rosin, see hookup culture as a boon: “The hookup culture is …

bound up with everything that’s fabulous about being a young woman in 2012—the freedom, the confidence.” But others lament the way the extreme casualness of sex in the age of Tinder leaves many women feeling de-valued.

If I were like, Hey, I just wanna bone, very few people would want to meet up with you …“Do you think this culture is misogynistic?

” he asks lightly.‘I call it the Dating Apocalypse,” says a woman in New York, aged 29.

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.