first thing (other then gf fingers) I put in my ass was a carrot. I'd go to the market looking for the thickest carrot I could find...lol
I always thought cucumbers were too big but got up enough courage to try one and it was fantastic. The smooth sides make it easier to insert.
BUT, after reading about anal fun I found out that you should NEVER put anything up there that does not have a flattened base or your next stop might be the emergency room asking for help in getting this thing out of your ass.... lol
how about explaining to the doctors how you got a gun stuck up your ass??