Why should I put two pillows in a hotel single bed?

Although the single bed in the hotel is a single bed, many times there is more than one person staying in the hotel, like many couples in the university. They always open a single room when they check in, but when they sleep, they are a man and a woman, so it is just right for them to put two pillows. Moreover, the hotel staff will not say anything when they see that you are a room with two people sleeping in a single bed. By default, a single bed can sleep two people and can put two pillows.

Secondly, sometimes a single bed really sleeps alone, so a pillow is not enough when some people want to lean on the bed and watch TV. One pillow is placed below and the other pillow is placed vertically above that pillow, so it will be much more comfortable to lie down. The hotel must have considered this situation, so it put two pillows on the bed.

So whether one person lives or two people live, two pillows are just right, which makes people look neat.