Most Helpful Guy
As I see it, it can either be because he wants to see you naked.. Or he's in the mindset that being naked around one another is more romanti, c as in you're keeping no secrets and "open up" more to the other person.1THIS IS NOT RELEVANT ANYMORE
Most Helpful Girl
You're 17yo with a boyfriend. Do you REALLY need to ask "WHY" he would want to swim naked with you?
media.giphy.com/media/b1kgk5tYEwS9W/giphy.gif0THIS IS NOT RELEVANT ANYMORE