Mazel tov to Mark Zuckerberg, who over the weekend married his girlfriend of 9 years, Priscilla Chan. Dating an eccentric billionaire seems like it’s probably no cake-walk, but Priscilla has obviously done a good job of making sure their relationship remains a priority for the Facebook founder.

According to Business Insider,

Because Zuckerberg is so busy with Facebook, Chan set some strict ground rules for their relationship. Chan requires a minimum of 100 minutes of alone time per week, not at Facebook. She also requires one date per week.

100 minutes is less than two hours, but even that can seem like a godsend when you’re dating someone who is just really, really busy.

Obviously, this verbal contract (or, who knows, maybe they had a lawyer draw up some papers!) worked well for them.

Personally, I’m pretty pro agreements or pacts within a relationship. It could be about anything, from the frequency of sex, to the divying up of household chores, to where you spend holidays together as a couple. It may seem unromantic to mandate rules, but having a clear set of expectations for both partners makes it easy to ensure that needs are being met.

Have you ever had an agreement or pact with a significant other? Would you in the future?

[Business Insider: Who Is Mark Zuckerberg's Wife?]