Just a quick one, and I know I haven’t written one of these for a while…
Why does meth make men horny?
First of all, meth makes everybody horny. I don’t know or care why, but it does. Deal with it, or be sensible and don’t do meth, because it does a lot worse than increasing your libido.
Another thing meth does is make people stupid when they’ve been awake for long enough. Stupid people ask the wrong questions. Why doesn’t matter. It does what it does. Why ask a question when you don’t really want to know the answer? (Yeah, I am being sarcastic because I don’t want that question answered. Fuck you.)
Do you really need to know? Do you really want to know how meth works on your brain, which neurotransmitters are involved, and so on? There’s a lot you don’t know, a lot you don’t need to know. You need to know that meth is a short term path to a great high, and a long term path to destroying your life, ending every relationship you have, losing all your possessions and maybe your mind, and leaving you with nothing. But by all means, remain oblivious to the way it effects you and wonder why it makes other people horny.
Thinking about this some more… I made some assumptions when writing this. I assumed that the person asking the question is a woman who uses meth, asking about a man who also uses meth, oblivious to the effects of the dug on herself.
I could be wrong about the situation, but probably not, because when we use meth, we think that our feelings like anger over little things, and our sexual desires, are normal. We see the effects of the drug on everyone else but think our feelings are “real”. They aren’t. If you use meth every day, you are under the influence of it all the time, even when you don’t feel high. Every feeling, everything you say and do, is directly or indirectly influenced or fueled by the drug.
The reason I could be wrong is that the same question could also have been asked by someone in a relationship with s user. If that’s the case, then my advice to you is get out. Give your partner an ultimatum and make them choose you or the drug. because as long they use meth, they are in a relationship with meth, not you.
Skeptical Exaddict 
I suspect you become horny because meth puts the prefrontal cortex at rest. Then the midbrain a.k.a. your reptilian brain is allowed to be more active.
BTW, talking of the midbrain, have a look here, Jerome: https://skeptoid.com/episodes/4613 . A lot of midbrain activation bullshit refuted by Brian Dunning.
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Makes sense. Thinking with the midbrain comes down to “I need to kill/eat/fuck”, right? So it’s more about acting on instinct and not engaging in thought.
Can’t check out that podcast now but will do. One thing they taught me at rehab was an idea pushed by Dr Kevin McKauley, that in addiction, we choose to use directly with our midbrain and bypass the cerebral cortex – bypass conscious thinking. (Sounds like an awfully good excuse to claim “powerlessness” rather than take responsibility.)
That strikes me as something I should be skeptical of, since in addiction I chose to perform many different tasks in the act of getting and using drugs. For example, drive to meet dealer, wait for dealer, continue to wait for two hours, purchase meth, purchase a meth pipe and if I could not then purchase a pen and globe to make one, make a meth pipe, wait for an opportunity to use, use the meth. Those tasks involved a lot of thinking, and could not be done exclusively by the midbrain.
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@Jerome: Your demur also makes sense!
I think addiction means to concentrate your thoughts within a very small area. Like not using the whole palette. Cf. OCD – then almost all your thinking is located to an extremely small area of thoughts: How can I get the drug I’m longing for?
Addiction and OCD are often two sides of the same coin. Obsession is the common denominator.
Or am I thinking wrong here, Jerome?
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Nope. I think you’re right. I always was an obsessive person and found that meth allowed me to be even more obsessive, since that’s what tweaking often involves… obsessing on and engaging in one activity.
I’m also impulsive though, so in some ways it (my behaviour) went against my nature.
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When I do Meth it makes me so horny I would lick stick or eat any woman around luckly I have my girlfriend of six years and Meth makes her the same way we both have the most unbelievable orgasms I have never felt pleasure like Meth sex .
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