Joke Collection Website - News headlines - Why are slogans habitually stuck on the wall?

Why are slogans habitually stuck on the wall?

first, cultural traditions

such as "blessing" upside down, that is, "blessing has arrived".

second, aesthetics

Slogans or pictures that are suitable for oblique pasting can form an unbalanced aesthetic feeling.

Third, personal reasons

When posting, the line of sight was not flat.