Dan Ariely , a professor of behavioral economics at the Massachusetts Institute of Technology, said the apparent contradiction doesn't surprise him.
While the women who were surveyed went to great lengths to screen online acquaintances before meeting them, nearly a third reported having sex on the first date and three-quarters of those said they did not use condoms, according to the study by The University of Texas School of Public Health.
Those behaviors reflect a "virtual intimacy" the women developed with men online before meeting them in person, said the study's author, Paige Padgett.
"They may not think of it as being risky sex," said Padgett, a research associate who specializes in epidemiology and sex research.
"They don't see it as a one-night stand, even though it might turn out that way, because they really feel they have a relationship with this man." Padgett surveyed 740 women who posted personal ads on seven dating Web sites.
Some were looking for love, others for sex, she said.
During the five-month survey, which began in July 2002, 568 of the women met face-to-face with at least one man with whom their first contact was online.
After taking precautions to ensure their safety during the first in-person encounter, 30 percent of the women reported having sex during that date, and 77 percent of those did not use condoms, Padgett reported.
Alexandria Vera, 24, allegedly told school district officials she had been engaging in a sexual relationship with the young boy since September, after they began flirting during a summer school session.
Alexandria Vera, 24, (left in her police mugshot, and right, from her social media) allegedly admitted to engaging in a sexual relationship with the boy since September, after they began flirting during a summer school session According to court documents, Vera said the parents allowed the teen to spend the night at her house, after which she would drop him off at home in the morning so he could catch the bus to Stovall Middle School in Houston, Texas.
Vera decided to have an abortion however, after reportedly getting nervous about their relationship when Child Protective Services unexpectedly showed up at school in February, to question her and the student about their relationship.
Aldine ISD, the organisation that runs Stovall Middle School, issued the following statement to ABC-13: 'Aldine ISD has been made aware that charges have been filed against a former Stovall Middle School teacher involved in inappropriate behavior with a male student.