Absolutely! My boss’s ex-partner used to do that while speaking with my boss in his office.
I would walk by and see him sitting on the chair across from his partner and with BOTH of his shoes on my boss’s desk.
It used to drive me crazy!
I did it in my office on my desk paid for by me. But during break or after hours and it was my business.
But never during business hrs with an employee or customer in the office.