The room isn't designed for long-term human occupation. There is no bathroom, no food, no bed, no climate control - though this is Florida, so climate control is not such a concern - no plumbing.
But there's lots of magic. It's such fun to make, after all.
(Nathan had been worried he'd have to ask one of the succubi, or Joham, for lessons on what might whimsically be called "safe sex". He likes not having to bother with this better.)
Well, there's disturbance of the peace, but they'd get a warning first, and they'd find all the participants uninjured if they insisted on having a closer look, so that's all right. How many screams does it take to get to the center of the Jacksonville Police Department? (Doesn't matter, the results will be invalid; Nathan got impatient and bit.)
And then the taste changes.
And his purr becomes a snarl and without thought he bites and tears and thirsts and it's so delicious, there is no flavor but this in the world, the ever-present pain of thirst has gone and he's drinking and drinking and drinking and there's nothing in the universe but the flow of singing blood.
Success.
He lets himself heal; with Nathan's teeth in him this deep even his overactive healing power isn't going to force them out again by itself, and it means he doesn't have to worry about blood loss.
Nathan was talking like he could do this forever. The Joker wonders if that's true.
Finally he is as sated as he physically can be, and he's just licking venom into the wounds, making small sounds in the back of his throat. When he looks up, his eyes are brilliantly burgundy.
"You're a marvel," he gasps, having neglected to play at breathing throughout his meal.
"Did my eyes go?" he murmurs after a moment. "I bet they did. Better phone Maggie, let her know it's nothing to worry about before Alice eye-checks me and thinks I've been devouring the population of Florida."
"It's a gorgeous colour," he says, and leans up to kiss Nathan's forehead. "I should make you a shirt that colour."
"Hallo, Maggie!" he says. "Calling to say that I have not killed anyone, my eyes are red for entirely innocuous reasons and Alice should not advise Her Majesty to have me punished upon seeing them. Well now, must you know? All right. I've gone and gotten mated, if you hadn't heard, and - yes, thank you - and he's got a bit of offworld magic, and if he likes being bit and he's fine afterwards, I ask you, have I any reason to complain? I have not. That is the story. Say hi to your lovely wife and daughter for me, will you? Bye, Maggie."
Although he does take a moment to kiss said tummy, bestowing on it the entirely imaginary restorative powers of his affection.
They hang out in the hotel room for a few days, fixing Nathan's eyes to be less conspicuous before leaving, and then they wander Jacksonville looking at tourist attractions and occasionally making out fiercely on street corners, and they begin walking north. They have all the time in the world. Why hurry?
He likes being in love this way. It's nice. Not as intense in some ways as being in love with the Bat, but in a lot of ways more fun. And Nathan is gorgeous and funny and immensely lovable.
Just for the hell of it, a few days out of Jacksonville, he magics himself vampire levels of durability and waits for Nathan to notice. Shouldn't be long.
It is indeed not long. "Not so fragile today, babe?" Nathan asks half a second after hauling his mate into their motel room en route to New York, squeezing his hand. "Don't feel like getting broke?"
"Thought I'd try it out," he says, squeezing back. "See what it's like when I'm less squishable."
"Well," says Nathan, "I guess it's like this," and they proceed to have unusually painless nookie.
"That was nice," the Joker concludes, cuddling up to him afterward. "I wouldn't want it like that every time, but it was nice."
"Well, it's true. I don't mind, though," says Nathan, (nuzzle nuzzle), "long as you do love me back."