|This is the important part. More after the break.|
You see that? You know what that is? It's a beautiful thing. It's a lovely woman with a lovely body. That's all. She's not doing anything exceptionally sexual, and certainly not compared to what all the top girl groups are doing with their asses, but KBS decided that move had to go and made them change it to this.
Now, between these two moves, there is little difference aside from the fact that in the former her boobs are bouncing out front. Her completely covered boobs, mind you. Yes, she has a slight movement of undress, but it is only her jacket, and this is nothing compared to the highly sexual flashing of the inner thighs that Girl's Day is doing right now uninhibited. So basically, Serri gets her choreo changed because she is a woman with a desirable womanly body.
You can bet your ass that if Taeyang wanted to have a special stage involving him shirtless and flexing his muscles in crotch-flattering pants humping the floor they would allow it. They made Serri change her part (which she likes, by the way, if you watch her in the fancam) simply because she is a woman and KBS is afraid of that OR of the jealous bitches who call them up to complain because their tits aren't as nice as Serri's.