I've designed a race of creatures known as gloomstalkers, avian beings resembling a cross between a raven and an Archaeopteryx, that possess human-equivalent sentience.
One of these is the inherent ability to alter the composition of their bodies, both externally and internally, converting it into a substance identical to candle wax, henceforth to be known as simply wax. In-universe, this ability was bestowed upon them by the deity who created their race, as she designed them in her own image.
As of right now, this ability's sole purpose is to allow a mated male and female to merge their bodies/melt into one another. In this way it acts as a metaphorical and literal means for them to convey their status as united in love, and to get as physically close to one another as possible.
I also opted to allow these creatures, provided they had converted themselves into wax, to be able to do the same to most of their organs. They could then pull these organs out of their own body and hold/manipulate them. They would continue to remain functional, naturally, or things would not end well.
Once I arrived at this point, a glaring issue came up regarding the presence of essential accessory structures connected to these organs, namely blood vessels and nerves. Not only must they continue to carry blood and transmit nerve impulses, they must also be made of wax and immune to harm while in this state.
The crux of this issue comes down to explaining how this is possible. I've wracked my brain, but I inevitably end up falling into a rabbit hole of complexity. Should I even attempt to provide any logical basis for this, or simply write it off as being a god-granted power that is magical in nature, thus evoking the principle of "suspension of disbelief?"
Lastly, how should I address the presence of connecting blood vessels and nerves, which would form an unsightly mass of tubes and strings, when an organ is extracted from the body?
Edit: if I missed anything or any other details are required for clarity, don't hesitate to ask.