They are, in fact, the real deal, though Len looks a little concerned that Mick might pull on them too much and cut his wrists. Though, maybe in the context of what they're doing, that's a good thing.

"I know we know each other a little better than the usual people keeping us from not touching."

He makes sure Mick is seated properly on the bed, before beginning to pull off his partner's shoes and socks, kneeling in front of him.