What do you think?

I have a 2 year old son (almost three) and two SS’s (6+9). I’ve been trying to teach my son consent (as much as you can for a toddler) and get into the conversation that it’s okay to say no. So I’m a big believer that no one should be seeing him naked besides the people that take care of him and have to in order to bathe him or change his diaper. As he can’t yet consent to anything himself. Now when we have my SS’s over, my husband will change our son in front of them and let them look at him. Or he’s brought up the topic of just letting one of his sons bathe with our 2 year old. Which for me is a big no. They don’t have to see him naked. And he deserves his privacy just as much as a grown adult. Also I think the idea of a 9 year old bathing with a 2 year old is really weird. My husband things I’m over thinking it and says it’s not a big deal and that he can do what he wants, especially when he’s watching them all himself when I’m at work. But what do you guys think? Am I over thinking it? Also how would you tell the other kids to give him privacy when my sons changing? When I try to change him they throw fits when I try to kick them out of the room or go to a different room to change him, they for some reason want to be around when he’s getting changed.