Where I come from, this is not unusual at all. Men will help you with the coat (I remember my cousin always helping his mom, or my dad helping his sister put her coat on when she would come over. I would for example always hold it for my grandmas). There are cultures with strict sets of rules, how you greet and who greets first, the form of address, opening doors, pulling chairs out for the ladies, quiet hours after lunch in apartment buildings. It kinda becomes a usual thing.
But I can see how niceness may freak you out.
I miss niceness and good manners.