I suppose your skills are irrelevant to the question. The main point is, who taught you what you do know? I was talking to a classmate this morning, and she was not-so-subtly bragging about how amazing she is at it, and she started giving me tips and pointers (all stuff I already knew, stuff that seemed beginner-level). But it got me curious about where she learned it all from. It seemed too personal to ask in a casual lunch-hour conversation, so I'm asking here. Where did you acquire the majority of your training as it were?

I learned what I know from a combination of porn (written and visual), practicing on various phallic objects, and actual real-life experiences. I find you learn so much more if you pretend to be a beginner, and let the guy explain to you in detail what he likes. Better to have him amazed at how fast you learn than to be disappointed that you don't live up to your boasting.