Sometimes.... everyone is too serious! 'To spite her' just means...you are going to do it as a joke to see how she reacts. Its harmless fun. She doesn't think you would, but you do it anyway...just to get a rise out of her.....and besides, there is nothing wrong with it. Just because she doesn't like it... (try telling your wife what style to do her hair....you will see how well that goes over) sometimes a little push back is healthy, it reminds everyone its a two way road and sometimes guys want to have fun too!