We don't have to sleep

My mate Rikh recently told me that going to sleep is opt-in/opt-out. At first I didn’t believe her but she showed me the evidence and, I can tell you, there’s no doubt about it: humans don’t actually have to go to sleep.
“Although going to bed can be a pleasurable experience and dreams are certainly sometimes exciting,” she said, “just listen to what I’ve been doing while you’ve been slobbing out in bed, like a dumb dog, with your stupid eyes shut...”
Unfortunately she swore me to secrecy; therefore I can’t divulge any of the amazing things he’s been up to. But she’s had some right times...