, people wear certain clothes for particular social situations. .
I don't know about you, but clothes does make the man - as the saying goes - you wear the kit - you feel the kit.
Paintballing in a suit and tie - just does not feel the same.
when I turned up for a training weekend, it won't till you were in uniform you started to switch on to soldiering, marching about in civvies just did not feel right.
same with cycling , you put the kit on - your brain says - your in cycling mode. And the right kit inspires you live upto it. - If you look the part - you are the part.
for me (oddly) its helmet,gloves and shoes that switch my cycling mode on - I will cycle in anything comfortable after that.