I figure varied experience is probably most useful. If you wanted someone who knows what to do, you'd probably be best off with someone who has had several partners of that sex and has listened to them and paid attention to how they reacted. That parson would be more likely to be experienced at adapting to a new partner, and have an idea of several things to try that might work. As long as they don't hold onto foolish notions like the idea that because some past partner(s) liked something everyone else must enjoy it too. But I have a lot less of that with females than many males I know, so I'd expect to be less good at pleasing females than they are. I'm sure I could learn, if I really wanted to. But I don't want to, which is a pretty big obstacle to learning.