This is the backbone of editorial street photography. Rich and poor. Old and new. Sacred and tacky. The serious and the absurd. The advertisement and the reality.

You're not manufacturing it. You're noticing it. The street provides it constantly. Your job is to be positioned correctly when it lines up.

Watch for: heavy-handed juxtapositions - a homeless person beneath a luxury advert is too obvious and too easy. Look for the subtle ones. The funny ones. The ones that reward a second look.

The point: juxtaposition is how street photography makes arguments without words.