Weird question about orgasm

So girls a few nights ago I was changing my clothes getting into pajamas. And I felt hot so I laid naked on the bed but I went into doggy style position I just started moving back and forth in a fast motion. But I never touched my vagina. I kept on going imagining my man was at the back of me pushing me back and forth. And all of a sudden I think I orgasm ed. My question is, is it possible to orgasm without touching your vagina? Have any of you tried doing it like this? Seriously I need to know. I was amazed when I finished I never even touched my vagina. Just by going back and forth fast and slow I orgasm ed.