Helen, I am a firm believer of having back-ups for the back-ups! I have Geek-Pride, and I am not afraid to show it

Men always have cash in their pocket as well as in their wallet. Just in case the wallet gets stollen...
Men will have every credit card they have ever owned, including the expired ones, in their wallet.
Usable credit cards have to be creased in some fashion because of being in the overly stuffed wallet.
4.2 kg of loose change - You neve know when you might find a wheat-penny! No, men do not fumble for exact change. They simply add to the kilograms in their pockets.
Wallet goes in the left-rear pocket if you are right-handed. Hankerchief, which may substitute as an oil rag, goes in the right-rear pocket.
Possibly a poket comb if your hair is longer than a brush-cut.
A Swiss-Army knife is a manditory object. Most men would build an entire house using a Swiss Army knife if they could. Being given your first knife from your father or grandfater is a rite of passage.
Possibly nail clippers and chap stick.
Chaunte