With most of us spending more time with our colleagues than we do our loved ones, it’s understandable that certain habits grate.

Noisy eating is one obvious culprit when it comes to sloppy office etiquette, and so too is being late (even if - side note - it means you’re pretty incredible).

But petty gripes aside, there are some co-workers whom we just can’t seem to get on with at all, no matter how many delicious doughnuts you throw into the mix.

And, according to Maria Baratta, a New York-based clinician, there’s a good reason for this awkward chemistry.

Baratta says that in her 20 years working as a therapist, she’s found that people who complain of annoying colleagues are usually triggered by a similarity to their own family members.

“It’s interesting to look at the people in your workplace and try to figure out who the characters from your family of origin might be in your coworkers,” Baratta writes in Psychology Today.

“[…] For example, the coworker who eats your lunch or constantly borrows your pen and never returns it might be reminiscent of your brother or the bossy coworker who corrects everything you say might be your mom or the grumpy manager might be your dad.”

The deep-rooted reason why certain work colleagues annoy you