How Did You Learn to Fuck?

Here’s another question, but for mostly for girls. But if you have a story about a girl, then I'll be curious what happened to her.

How did you learn to fuck?

Did you just experiment with your boyfriend and learned over time?
Watched a lot of porn and copied what you saw?
Bounced from guy to guy, learning from different experiences?
Met a guy who taught you how to suck and fuck, essentially turning you into a whore?