When this story started and Lucas met, and started to live with his hosts, for me, there was a definite undertone suggestng that Clara was gradually going to baby him more but it never developed. I am not sure if there was a thought, early on, for the relationship to go in this direction but it felt like it was flagged. I would live more AB aspects in his relationship with Clara, maybe things like bottle feeding while they watch a movie, baby talk, AB clothes etc. I think Lucas would definitely lean into that and, deep down, wants it. There have been little hints towards that already in the bedtime interactions with him and Clara!! Hopefully you can add some of this in. Thanks,
Sitting to toilet yourself certainly is a big change given how many of us were conditioned, dropping our underwear and I'd say can add to that feeling.
I wouldn't wish to push anything on you but what I'd say to all of us feel free to explore what you find in you and keep with that you enjoy the most as that's what this thing is ultimately about - being us we are - not tick boxing somebody else's idea.
We're all weird compared to other people so just accept and love that weird stuff that makes you, well you.