When I am with someone new I carry that parent part with me, and also my bright adult fact checker. I wonder if being myself is like bringing out my inner child.
Because I don't relate to parts, this may not be useful, but that is all 'you'. If it's coming from you, it's a side of you. (But I surely wouldn't want to NOT employ choices such as adult fact checking, as you/ we are adults!)
To me, being me is the awareness of my strengths and faults, and self-awareness, what I burden others with, what are my capacities, likes or how I feel in my heart. To be honest with myself and others.
Tbh, and I say this very respectfully, and realizing there's more to intimacy than physical intimacy, but I can't quite understand (apart from rape) how when people have had children they don't realize they've been pretty physically intimate? Even delivering the baby and their relationship to their doctor. Or choosing to marry. You had asked how things may have changed over the years, so for example in that case, maybe with your H you dissociated, and now you may not? (Or any other example). But maybe you began with an ability towards intimacy you're not giving yourself credit for? (It's a relative thing. For example, a masectomy often interferes with people feeling intimate, one it's their self identity, the other sometimes afraid to hurt them. Etc. And not just meaning physical intimacy). I think waxing and waining is normal.
To me I guess, it's who and how I trust, and with what, and they the same with me.
ETA, for example, I provide a lot of personal care. There is zero 'sexual' about it. But they trust me with their safety, health, care, and above all Dignity. Now, while we complete it we're laughing and talking, sometimes about very personal things. That is the intimacy, that they trust me with that. And I do my best. But personally, I can provide the care, I couldn't receive it. And I've had some people feel the same, and they all came around. But I would likely avoid it at every cost I could as regards myself.