These jokes are sooooo funny bro.
Why waste your time posting
This isn't necessarily a joke. Cheese and other dairy products contain the protein casein which breaks down into casomorphin. These casomorphins then attach themselves to opioid receptors just like endogenous endorphins and exogenous opioids i.e. hydrocodone, heroin, etc. I haven't read up on this next part but that's probably to help give infant mammals a desire to drink their mother's milk which likely produces a relatively strong high the first handful of times it's drunk. I suspect tolerance builds pretty quick in a similar way to the endorphins we produce during strenuous activity.
I actually have a relevant story to all this. Around a couple months ago I had been taking high doses of phenibut daily for a month and a half or so after my tolerance to smaller doses rose very quickly. It put me into this sort of hypomanic kind of state where I didn't feel pleasure to anything I used to but was still constantly euphoric. For example, food, sex, and formerly pleasurable drugs (i.e. opioids, amphetamines) and other activities caused no additional euphoria than I was already feeling from the phenibut. I have a few theories as to why, but won't get into that now. Anyway, I ceased phenibut cold turkey one day and a few days later did some continuous, heavy yard work for a few hours. When I was done for the day I felt this amazing endorphin high and it honestly felt like I had orally ingested a decent dose of some opioid (orally because there was no rush involved). This feeling faded away over the next 5 to 10 minutes and following similar activity over the next few days, albeit less strenuous, I don't recall feeling much of an endorphin high, if any.
Now for the most addictive drugs I've tried (plural because it's dependent depending on whether or not I have phenibut in my system):
When I'm on phenibut the most addictive drug for me is nicotine, ingested through smoking cigarettes. This is odd because when I'm sober I have zero desire to smoke and while on phenibut, cigarettes don't cause anything more than maybe slight lightheadededness. Well, sometimes I get a relatively strong nicotine buzz but it's hit or miss and doesn't correlate with how long it's been since my last cigarette. My point is that I feel a strong compulsion to smoke while on phenibut. This is the opposite of what I've read relating to other people who may be nicotine addicts when sober, but lose the desire to smoke while on phenibut.
The most addictive drug I've tried while not dosing phenibut daily would have to be heroin (although I've never IV'd) and other opioids. Still I didn't so much enjoy the effects of opioids the first handful of times I did them. The specific opioid was hydrocodone ingested orally and I think it took my brain all those initial doses to adjust to and then really enjoy and crave the euphoria opioids provide. The reason I tried hydrocodone again after the first time was just because it made me feel different as I was new to mild-altering substances in general. Even the first time I did heroin, after only having done pharmaceutical opioids, I didn't really enjoy it. It felt dirty relatively speaking and the short duration wasn't appealing (after the rush following intranasal ingestion there wasn't much of any high whereas with intranasal oxycodone there was a nice, mellow high after the rush subsided). I believe after more consecutive doses of herein, in the following days and weeks, my brain became more adjusted to the rush it provides and then began to crave it and therefore love it over the longer lasting highs other opioids would produce.