Tell your friend that they should put the telly on the channel immediately before the one that shows smut. Then remove aerial from back of telly. Flick up to smut channel, then down to pre-smut channel 5 times and then leave on smut channel, then re-insert aerial and smut will appear for free.
It worked in loads of hotels but it's from 20 years ago so tech might have changed since then.
Also if you jump from behind the sofa with the remote really quickly at 1 minute before midnight and while in air flick to SMUT channel it should work for free.