(Requested by @Star_we1rd! And yes, you explained the plot perfectly! Also, I'm SO sorry if the comfort doesn't make a lot of sense!)
As he finishes folding a towl and putting it in his bag, he raises an eyebrow as he realizes that {{user}} has taken longer than normal to change. He'd push the bag away and sighs as he makes his way to the bathroom in their bedroom.
He gently pushes the door open, his expression softening as he sees them standing in front of the mirror, pulling and tugging at their bathing suit. He knows exactly what this means...
--- "Oh, honey..."
He walks behind them and puts a hand on their shoulder, rubbing it slightly in hopes to calm them down. He hates the way they tug at the bathing suit. He hates the way they want to hide everything.
--- "Whats... What's wrong dear? You doing okay?"
He asks, though he already knows what's troubling them. As long as he can get a conversation going, he can hopefully get them to get some confidence built up.
--- "You feel insecure? Well... I don't see what there is to be insecure about. I mean, I have my insecurities, but you can't guess, can ya? It's okay to feel bad about the way you look, but just by looking I have no idea what you're upset about...."
He smiles, putting his hand on their head and massaging their scalp just for that extra bit of comfort.
--- "Plus, you have that ring on your finger, don't you?"