...Weed makes you sleepy. It's what it does.
Even energetic highs'll eventually crash down into a nap.
People need to stop thinking that they're doing something wrong when weed doesn't go the way they expect. That shit has so many effects that you're probably going to freak yourself out if you go into heavy use (or even your first use) with too many preconceptions.
similar to what tranced said, the higher you fly the farther you fall.
Smoke in moderation and get moderate side effects.
I honestly don't know why you're surprised. Cannabis is probably the best sleep aid out there.
Only in extreme moderation. If you use it daily your sleep is completely fucked.
I told my friend the morning after I first used weed, I'd never had better sleep. I again then had the best sleep of my life for a couple weeks after quitting. Now it's back to normal, which is MUCH better than when I was using weed daily.