Yes indeed. I know there must be someone who doesn't like them though because I once played a gacha game and had to change my name from "Catgirlfetish" to something else because apparently that is deemed offensive to some.
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Not being able to sleep is the worst. On some days I fall asleep like a rock at 8pm and on other days I try to go to bed at 2am and can't fall asleep for like 2 or 3 hours. I tried going to bed at more regular times and at least the irregularities have gotten a bit less. But sleeping is still very difficult, waking up several times every night.
I am aware my coffein consumption is probably not helping, on some days I drink 10 cans or energy drinks, on other days I don't drink any. But I also didn't notice any direct correlation between drinking energy drinks and having issues sleeping on a specific day.