Why do they mostly sell cigarettes, alcohol and perfume at the duty-free stores?

Question

Why do they mostly sell cigarettes, alcohol and perfume at the duty-free stores?

Answer 1

These are typically "high tax" items that are easy to carry and popular to buy. For example, a carton of Marlboro is usually $15 - $25 in duty free. It can be over $50 a carton in the States or over $90 a carton in the UK. Big savings.

Answer 2

Because a furniture item is to big to get into the plane!

Answer 3

Because people are more likely to buy items relating to their vices maybe, and that items like that are taxed more... maybe.   Not saying my input is accurate.