Get this man some tissues, he just got turned on!

Why do people think this means being turned on? That is weird and false.

Well...in anime at least. Not irl

Actually, in anime it's wrong as well. My explanation is this.
When you blush, blood rushes up to your face. In anime, the blood rushes up to character's face so quickly, it comes out of the character's nose and occasionally mouth.

Plug your nose

*inserts tissues up nose*

O wait
This reminds me that an actual nose bleed happend at school during class
Yea that actually happened but not to me