The sissy is the one on the left who got her panties off first!
The sissy is the one on the right who love her panties so much she just won't take them off!!!
And is a little shy about facing the person taking the photo...After all, this is going to end up on Facebook and everyone on campus will discover who "she" is...
they all are. just at different stages. the middle I experienced and happy and proud of who she is. left is very eager to please and to be like her friend and right is brand new and so nervous.
I like this explanation.