Ricky's hypocrisy
The Mustache - season 1: Ricky grows a mustache, Lucy doesn't like it and he basically tells her tough shit and refuses to shave it.
The Black Wig - season 3: Lucy wants to try an Italian hairstyle, Ricky doesn't approve and literally forbids her from having her own hair styled the way she pleases.
What an asshole he could be sometimes.