I didn't. It wasn't until I started messing up other guys did my sales start picking up.
I don't think it's unreasonable, either. If you're messing up yourself, theoretically, there's no limit to how many videos you could make. But messing up other people is more complex and requires permissions (believe it or not, not all guys want to get slimed. Go figure. :? So it would be more valuable.
And then there's the fact that I look like...me. You, who looks very muck like not-me may fair better.
Not sure I am quite qualified to answer your question but here goes anyway. I of course don't make solos of myself, believe me no one would buy that, but I have made over 100 videos of others. Although I mostly do couple I have done well on my solos, if the guys hot enough, but, and this is a big but, after 2 or 3 videos with the same model the sales go down. So if you are only doing videos of yourself getting messy you better come up with more and more original ideas because at some point your fans will move on to a new guy. Don't know if that helps but its my advice.
Of course solo content will sell it may not sell alot but mine does. And if people like you and there arent any duo videos they could buy it. More than one guy always sells its just like if your nude etc it is more likely to sell.