Just teaching him a lesson.

Jason thought it was a good idea whilst in his swap class partner Samantha's body to take a few naked selfies and send them to his friends. 

He never thought they would send them on to their friends so by the time he returned to college the next day he was shocked to find out that the photos had gone viral and everybody knew what he had been up to.

Including the young lady who's body he was in and when she caught up with him.

She promised him he would regret the day he disrespected & humiliated her like that.

It wasn't until he got his body back that he found out what she had done to him.