It takes three drinks for a woman to engage in risky sexual behavior ... and other data about booze and sex

Your mobile phone can do so much these days. It can help you order a car, get your food delivered, arrange for your laundry to get done.

A growing number of women are using it for another purpose: helping them get pregnant, avoid pregnancy, and get general sex advice.

Glow, a startup created by PayPal mafia member Max Levchin, offers such apps.

Every now and then Glow polls the more than 4 million women who use its apps about sexual topics. It also looks at the anonymized data collected by its apps to discover insights into women's sex lives.

Glow just studied how alcohol influences sex and confirmed that there's a definite correlation between how much a woman drinks and the kind of sexual behavior she might regret.