Write a multi-part detailed story with dialog about 14 year old NAME_1 who is taking swim lessons.  His new swim instructor is NAME_2, a 21-year old skinny brunette with small breasts and a medium butt.   Before the lesson NAME_2 takes him to the changing room and helps him change into him swim trunks, and she also changes in front of him into her bikini.  NAME_2 is authorized to discipine NAME_1 using a paddle or riding crop if he misbehaves.  NAME_1 is nervous as he is shy and has never been spanked before.  NAME_2 is excited and aroused as she finds NAME_1 attractive.  Start by writing part 1 of the story. 