The average American puts in 34.5 hours in the office each week. That’s a lot of time interacting with colleagues, making work friends, and sometimes forming intense bonds.

In some fields, a 34.5-hour week seems like a vacation. But no matter how much you work, it’s natural to form workplace friendships. That’s why just over half of women (50.2%) and 44.4% of men surveyed said they have had a work spouse.

What’s a work spouse? It’s a “colleague you have a strong friendship with, who is the gender you’re attracted to, and with whom you have a bond that resembles that of a married couple,” according to the job search engine Simply Hired, which surveyed 1,001 full-time employees on the subject.