Never drawn H or echii? Was drawing porn by the time my age became two digits. Perhaps a little later, but before I was 12 for sure. Had a sorta guilt complex where I thought it was wrong to look at people naked on my computer, but drawing was ok since it was internal. After a while I found out that hentai exists, and soon afterwards I got into anime. I guess I'd watched some episodes beyblade and G Gundam beforehand, but I hadn't watched anything through before having seen H.
... not that I was good at drawing women, at the time anyway. I have to use someone else's scanner to get images, so I can't really do anything explicit at the time being, but here's what I can do now (moderately large image);
Drawing H really will honestly make you better at drawing though. Imagining reference material is kind of a natural thing, and it's hard to lose interest since it's porn and all. If I could get off on science homework I'dve cured cancer by now.