The brand began selling a small vibrator, the Mini, in 2009, and the larger Tri-Phoria in 2010. The strategy throughout for Trojan, a Church & Dwight brand, has been to challenge the stigmas associated with the products.

The company has advertised aggressively, even during prime time on some cable networks. In 2011, Trojan spent $10.5 million advertising its Vibrations line, according to the Kantar Media unit of WPP.

Today, the Trojan devices are carried in retailers that were not on the radar for sex-toy shoppers a decade ago, including Walmart, Walgreens, CVS and Rite Aid.

So new are the devices to mainstream retailers that growth in that channel has been phenomenal. In the 52 weeks that ended July 8, revenue for sexual enhancement devices sold in drugstores and mass retailers grew 23.2 percent over the year before, to $16.1 million, according to the Symphony IRI Group, whose totals do not include Walmart. Trojan, which accounts for 66.2 percent of the category at such retailers, grew even more over the year, by 40.2 percent.

According to studies financed by Trojan and published in The Journal of Sexual Medicine, 52.5 percent of women and 44.8 percent of men have used vibrators. Contrary to perceptions that they are used nearly exclusively by the unaccompanied, 40.9 percent of women and 40.5 percent of men report having used them with sexual partners.

“What we’re doing is taking something like a hot dog cart that is so everyday and so mainstream,” Mr. Weiss said, “and we’re showing people that vibrators are mainstream.”

Photo

Two commercials for the newest Trojan Vibrations product, Twister, which retails for $60, promote it as a spark for couples. One begins with a woman on the telephone with a friend.

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“All I did was mention it might be a Trojan Twister night and things totally changed,” she says, as her husband passes by first with a load of folded laundry, and then with an iron and ironing board.

“Come on, lazybones, shoe sale today,” he says at one point. Later, he pats the couch beside him with one hand, the remote in the other. “Big game?” he says. “Heck no, let’s watch ‘Desperate Bride Makeovers.’ ”

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The campaign is by Colangelo Synergy Marketing in Darien, Conn., part of the Omnicom Group.

Carol Queen, curator of the Antique Vibrator Museum and a staff sexologist for Good Vibrations, a sexual products retailer founded in 1977, credits the new Trojan ads with “pretty seamlessly integrating men into the campaign.”

As both a sales strategy and to more accurately reflect how the devices are used, “a company needs to overcome this notion that vibrators are problematic for couples because men don’t like women to use them,” Ms. Queen said.

Rather than seeing the growing availability of the devices at mass retailers as a threat to specialty retailers like Good Vibrations, Ms. Queen said, “what’s fabulous about the way that Trojan has entered the marketplace is that a rising tide lifts all boats.”

Some consumers who buy their first device as an impulse buy at a mass retailer are apt to eventually be drawn to boutiques like Good Vibrations, which along with Trojan devices has a wide selection of other brands — and knowledgeable staff members.

“Going to a sexuality store like Good Vibrations or many others, you have trained people who can answer your questions and help you choose,” Ms. Queen said. “What most customers are probably not doing is getting the greeter at Walmart to come with them to the vibrator aisle and asking them, ‘Which one should I get?’ ”

Claire Cavanah, co-owner of Babeland, a sexual products shop with locations in Seattle and New York, lauded the plan by Trojan to distribute free devices.

“It sounds fantastic and I’m just delighted that there is a company that has the resources and the sex-positivity to do it,” Ms. Cavanah said.

At the annual BlogHer conference that began Aug. 2, Trojan Vibrations gave out 4,000 devices, meaning that the brand is on pace to give away more than 14,000 of the products in August, with a total retail value of $540,000. Mr. Weiss, of Trojan, said the brand gave out a few hundred of the devices from trucks around New York last summer, and wanted to have more impact this year.

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“People were clamoring for the vibrators, and we thought that by giving out more vibrators, it would have more buzz, so to speak,” Mr. Weiss said.