We all know that friends and besties are different. Let's say, when a friend trips, we worry and ask if she or he is okay. When a bestie trips, we crack into laughter and start teasing in the most annoying way possible. Besties are whom you can act in the most comfortable way, including childishness. This is because they connect in the inmost part of the heart.
However, because they connect in the inmost part of the heart, they don't really care what they are wearing or how they look. They are comfortable seeing each other in a comfy way. This can bring such awkwardness when seen their friend fully dressed up, especially in a sexy way.
The realistic reaction was caught by G-Dragon and CL in GD's concert.
1st step - Spotting a friend wearing sexy outfit
2nd step - Covering one's eyes in disbelief
3rd step - Persuading oneself that this is not true. (feat. friend having fun teasing the other)
4th step - Running away