Assuming you're in a city made for humans:

You pass by the bakery. You're not hungry… but it does look delicious. You go back, look through the windows again -- and decide you are hungry!

If you're in a car, you don't stroll around. You drive where you want to drive. Even discovering new things is hard since the people behind demand you don't slow down.

(this is loaded with personal experience and preference, I can perfectly understand this doesn't match yours.)