Sure, there's lots of nice things to do in bed other than those two. But years ago, I took that advice from my business partner. Doing that improved my sleep (and life) significantly. It may or may not work for you (and you may not need it), but several people I know who started doing it reported that they benefitted greatly.

My hypothesis is because it trains your mind to associate bed with just those activities. Mostly sleep, because you're probably doing a whole lot more of that than sex.

So what ends up happening is that just getting into bed signals your mind that it's time to sleep. When you get in, sleep comes quickly.

I do the other stuff, reading, etc., in a nice, quiet place that isn't in bed. Then I get tired and go to bed, and I'm sleeping soundly very quickly.

It's a delight to see smaller humans feel so happy around the bed!

Wrestling toddlers and family story time are both essential activities!

Larger humans too, but you’d need a sturdier bed and a higher ceiling. ;)