Do you wad up a blanket and hump it to masturbate?

This was the first way I found to pleasure myself as a girl, before I knew what masturbation was. Since then it's the only way I can masturbate to get off. Direct clit stim/ fingering doesn't do it. I'm under the impression this is normal, but I've never heard anyone talk about doing it this way, and I've never heard about it being a typical method. Am I the only person on earth that gets off this way?