Front to back?

[Rich B 5,000+ posts]

Side to side, with some circular motions near the end.

 

[bigwheel15 10+ year member]

Front to back, with a quick zig zagging motion and a twirl at the end.

 

[hoss 5,000+ posts]

wow, alot of butt hole pleasures it looks like.

back to front is the way to go. but you have to ba able to accomodate the side to side in there before its all said and done.