It's a situation that a lot of guys can relate to. For seemingly no reason at all, with absolutely no warning, his significant other tears him a new one. After the shock and awe moment is gone, he realizes he should have seen it coming, because it's her "time of the month."
"It was one of those nights when you're sitting at the bar with friends, and for some reason the conversation got to significant others and PMS, and thought how hard is it to put together a calendar, and the idea was born on the back of a cocktail napkin," Eisenberg said.
The idea morphed from the napkin to a Web site called PMSBuddy.com. The free service keeps men aware of when your "wife, girlfriend, mother, sister, daughter, or any other women in your life is closing in on that time of the month."
The concept is simple. You enter the time of the month when a woman's cycle starts, and the tool sends emailalerts a few days beforehand, and even accounts for different cycle lengths.
The site launched six months ago, and Eisenberg says 100,000 people are using it worldwide. However, not everyone thinks it's a great idea.
"We do get comments from some people, usually women, who think we're being misogynist, but most guys think it's pretty funny and send it to their friends," Eisenberg said. "We typically have two responses. You shouldn't take it so serious, then, on the other end, if you don't like it, don't use it."
Eisenberg said he gets emails all the time from people who say it's helped their relationship. The tool initially allowed users to track only one woman, but that changed after the company started getting some specific feedback.
"Our users asked us to add the ability to track multiple women. We don't ask, we just react to what our customers want," Eisenberg said.
Along with the PMS cycle reminders, the alerts also include links for places to buy flowers and other items. The company has a is also working on an iPhone application for the service.