I went through a cords phase in my 30s, when I was busy fathering and bringing up children, and had a new job which sort of demanded that I dress smartly... I was training people every day, and had to make a good impression on them. I had three pairs from M&S in different colours (green, blue, brown). I pretty much exclusively wore those to work, only occasionally choosing different trousers. I kept this up for quite a while, till I heard one of the trainees whispering to another "always bloomin' cords!" to another as I entered the room