There are gains you can get by A/B testing but there a lot that you can't analyse that way. You can't easily A/B test whether growing bigger muscles will benefit. I think that's many significant factors. it takes a lot of work to make deep changes. Don't just go for interventions that are easy and therefore also easy to A/B test.

1) You may be interested in this article - The Economics of Sex. 2) Have you tried online dating? It seems much more efficient. [...] I like it :) [...] Some thoughts: * I doubt that it's because you're not unique enough. There are a lot of non-unique people with girlfriends. * I doubt that it's because you're not good looking enough. There are a lot of not-so-great-looking people with girlfriends. * It seems to me that there is some underlying reason why you haven't had success yet. I'd think that strategies involving your uniqueness and/or looks would be mostly fruitless without addressing the underlying reason. My guess is that the underlying reason involves some combo of awkwardness and lack of confidence. If my guess is true, I don't see it as bad news, because I see it as something that is very addressable. * If it makes you feel any better, I'm 22 and have never had a girlfriend.