I’ve been trying to look this up but get very vague answers. It’s part of a story I’ve been working on.
More often than not, what I read is “several hours” or “last for hours”. The most I can find is 6 or 8 hours.
But that’s usually from sales websites and things like that. Not clear if it’s actually real or not. Whether it can be longer or shorter.
It’ll smear nicely, especially on sheets and clothing, and if it’s just subject to skin on skin contact, it’ll smear on both (or more) parties before it gets rubbed off.