Oh god yeah!!! I love that too!!! That's how I started too when I was very young. Occasionally I explored my pussy with my fingers but I didn't really start using my fingers regularly until after my first sexual experiences (being felt up and fingered when I was 15) and wanting to reproduce the feelings while fantasizing about it.
I like lying on my back and using my fingers and toys but there's nothing like the good old face down grind. There's something so intimate about the full body contact with my pillow. I love using a satin pillow case while I wear a tight satin teddy. The sensations are absolutely delicious as my nipples and pussy slip and slide against the smooth satin. When I masturbate this way, it's a good thing I'm face down so I can bury my face in the bed and my neighbors can't hear me screaming when I cum.
I also love sex in any position that allows me to grind my clit. It's the best of sex with partner and masturbation. Some of my favorites are:
-lying face down flat on a pillow while a man pumps me from behind (the man has be quite large so that he doesn't slip out)
-face down with my body on the bed and pussy on the corner of the mattress and feet on the floor while being taken from behind (after experiencing this position in a hotel I had to go out and buy a new bed without a footboard so I could use it at home)
-straddling the arm of a couch while being taken from behind. This is another great place to use a satin pillow case for the extra sensation and so my juices don't stain the couch (an ex-boyfriend's couch had a permanent stain on the arm and it was always a turn-on when people would notice the stain and think that he had spilled something there)
Oh god! I"m so wet just posting about this! Now I need to get the satin out and have a really good hard grind!