Meth gets me horny as hell.
Thanks for the suggestion, but I don't ever plan on trying Meth. And considering Amphetamines do the opposite for me, it probably wouldn't work anyways.......:/
I don't advocate this, for your dick will have no skin after climaxing.
Haha! No kidding!

The last time I did this I was on 180MG's of Adderall and I was masturbating for 7 hours straight! By the time I actually was able to ejaculate my dick was so sore I couldn't touch it for a week without it hurting. My extreme masturbation session had left four big red sores on my dick. I don't recommend it either to be honest.
Never heard of this. I'll definitely look into it.
L-tyrosine is also good, however it could be placebo.
Very interesting. Since L-Tyrosine is a precursor to Dopamine that would actually make sense. Could be placebo like you said, but I've also found that after eating foods that contain a substantial amount of L-Tyrosine that I also have an easier time jacking off.
L-DOPA - a derivative of L-Tyrosine, and precursor to Dopamine as well - seems to work better - if you can actually get your hands on some - but I'll keep this in mind as well.
Small amounts of opiates are great, but it's impossible to climax.
Haha, I forgot to mention that. I've tried using generic Vicodin - Hydrocodone - in the past. But I also found that

Plus opiates tend to put me to sleep....
I guess give sildenifil(viagra) or amyl nitrites(type of poppers) a try.
I've used Viagra in the past. It didn't really make sex any better, it just gives me a a really hard, long lasting boner. :/ I might consider Amyl Nitrites, but I don't think I could acquire any.
Disclaimer: Do not combine any of these drugs. The adverse reaction from the combination of these drugs can be potentially fatal or can cause permanent damage. Consult a doctor or a medical professional before combining these drugs.
Too late!

When I was in my mid-teens I combined Vicodin with Adderall and had a very interesting black out. Apparently, I lite up a cigarette right in front of my mom - which I would have never done otherwise - and took a walk around my neighborhood at around 1:45 in the morning.
I woke up the next morning under my pool table in my basement. I had - again apparently, because I don't remember any of it - crawled through the crawl space that was underneath my old house and entered my basement that way.
Anyways, thanks a lot for the advice! I really appreciate it!