For one reason and one reason only. The purse! I just got the last 2 items of my EDC setup (a multi tool and OC spray) and I have realized I just don't have enough space! I am probably going to have to switch over to cargo pants and shorts for my casual wear because jeans pockets just arent cutting it.
My knife, multi tool, light and OC spray all have pocket clips but two items per front pocket is a bit cramped. I already have a pistol and a extra mag hanging on my belt so I don't really want to hang anything else on it. I already have enough of a problem getting to my wallet without flashing my gun so putting something else on my belt that I use a lot like a multi tool or my pocket knife seems like a bad idea. I would kill for a purse haha. (And no, I REFUSE to carry a man purse or a fanny pack)
I have considered not carrying the OC spray but as far as defensive tools go the spray is the most likley thing I have to be used in a defensive situation. In theory I could give up the knife but the blade on the multi tool is medicore at best. But after all is said and done I think giving up the knife is probably going to be the best route :(