That's probably lucky for everyone. It would get very uncomfortable very quickly.

Cal drops onto his side of the bed and grabs the remote off the nightstand.

Hopefully, Sherlock won't be distracted by a certain amount of fidgeting during the movie - Cal is making an effort not to be distracting and let Sherlock focus, but he's not used to watching movies sober these days. It feels weird.

(Almost as weird as watching a movie whose main character you just met. Milliways.)