If you're man in a couple, when you go out do you feel you have to 'compete' with other men for her attention ?

Or should it be automatic that she is 100 pct there for and with you and if other men try to approach either she and/or you intervene? Does a man in a couple have to 'defend' his wife/partner/girlfriend from other sexually predatorial men?

I ask because fancy dates were never a feature of any of my relationships. I remember my second ex showing me her really fancy going out clothes but we never went out on fancy dates and she never put anything fancy/erotic/sexy on for me.