Sensation with an implant, especially when erect and during sex?

[Anon1998]

Haven't got an implant yet, but seriously considering it. It seems to me that the reason erections feel good, either with or without stimulation, is that certain tissues are already stretched, and the mechanoreceptors are more receptive to additional deformation. With a flaccid or insufficiently inflated penis, stimulation feels like nothing. I'm wondering whether an implant would return that feeling.

When the implant is inflated, does it press against the tunica? Does the implant exert turgor/radial pressure? Do you get that stretchy/full feeling in the corpora? What is the girth of the total corpora like compared to before, or even a normal erect penis? Including near the tip.Does an inflated implant get you horny?

I've also heard guys say that they slightly deflate the implant for better sensation. How does that work? Why would full inflation reduce sensation or cause pain?