My advice is to make them very good friends, snuggle together for warmth at night, and leave the rest to the reader's imagination. Show, don't tell everything
Silence. Not even the slightest sliver of sound made it to Nightborn's ears as he floated in the void. The deafening silence brought a ringing to his ears. It was so painful that he lifted his hand and pressed against his forehead as if to shield himself from the pain. He opened his mouth to … Read more
I did something similar once in a (very) short story. It might help.
Karl Vonnasti stretched contentedly as he floated naked on a cushion of warm air about a metre above the floor and watched the multi-faceted monosphere pulsating with blue-green radiance as it hovered above his chest. He knew it would have signalled … Read more
Silence. Not even the slightest sliver of sound made it to Nightborn's ears as he floated in the void. The deafening silence brought a ringing to his ears. It was so painful that he lifted his hand and pressed against his forehead as if to shield himself from the pain. He opened his mouth to … Read more