I like to be on top with my hands wrapped under her, toying/fingering with her ass.

Most girls dont like the idea of anal play until you slip a finger in there....and then it's like "WOW, do that some more."

You can do the ass-fingering doggy style too, and if they like it.......go front to back after you work it a bit but please, be take is S-L-O-W and grease it.