I'm going to send spicy pictures to someone I've been sexual with for a while
What is your reason for wanting to send spicy pictures to him?
I want him to remember what I look like when I am naked.
It can be normal to exchange pictures with people who are seeing but you should make sure that they are okay with it. Some people will find it offensive.
It's fine, he loves it and it's none of your business.
Well if you are convinced that he will like it then go ahead. It sometimes would just be safer to ask before doing something like that so the person is not caught off guard.