Do you think that I could insist that my fiance dress up more for his birthday?
What is your reason behind wanting your fiance to dress up?
I just want the man of my dreams to look good for his big night.
If your fiance has a formal event planned for his birthday, it's okay for you to ask him to dress up and look his or her best. It's important for a partner to put effort into his or her appearance so that they can remain attractive in the eyes of their partner and not look slovenly in public. If you think your fiance isn't dressing appropriately, try shopping with him for new clothes that he can wear and enjoy while out for his birthday.
I'll never follow your advice.
It is me agreeing with you, why wouldn't you want to not follow what I have to say if that is the case? Your SO should dress up nicer for his special event.