List everything you have put up your butt-

toothbrush
cigar cover
pen
dildo
figer
dick
remote
battery
paper towel holder
fishing pole end
vacuum handle
broom handle
wooden spoon
long sausage
flashlight
screwdriver

Fairly simple list.
suppository
Doctors finger
colonoscamy probe
rectal thermometer

Sorry, but I think of my anus as an EXIT only.

(most of the following were wrapped in condoms, or else washable / disposable)

q-tip
bic pen casing
my fingers
banana
hammer handle
JO buddy's cock
various Flashlights (including a D cell Maglite)
English cucumber
Plunger handle
Various sized dildos/vibrators, from small to huge
Small butt plug
vibrating egg
two small ben wa balls
kid's heavy plastic spoon handle
disposable razor handle

That's about all I can think of......

pencil
vibrating egg
small carrot

candles
screwdriver handle
finger
dildo
rectal thermometer

Most of the above, plaus a few more:

1.Nozzle of douche bag to fill my rectum with water to be expelled at orgasm, a big water spurt with each spurt/orgasmic contraction (in bath or on back deck)
2. 1.5" diameter marbles--21 of them, to be expelled at orgasm , one marble pops out with each spurt/orgasmic contraction
3. A 7" birchwood dildo, homemade and sanded silky smooth, covered with a condom to keep the wood looking nice. Knob at end is bigger than shaft so it pops in so nicely and stays put, even if I pull on a air of panties and go out in public.
4. Chrome ball from a trailer hitch, attached by a leather cord coming out of my bum hole to an anchor shackle clamped around the base of my balls. When I use my internal muscles to pull in the chrome ball, it tugs at my bulging balls, which stretches the skin of my cock shaft taut. Super hot orgasm from this as I fuck a Fleshlight.

Two fingers
A finger of latex glove, filled with 3 plastic balls 1" dia.

Not a lot really.

In order of appearance
Finger
A screwdriver handle
A friends dick

Soon to be a few toys too.

Love things in my ass!!!!! here is my list,

Finger
Pencil
Pen
Spit (not sure if it would count lol)
Panties stuck in with a pen
Carrot

Not as creative as some of you but:

Fingers
Buttplug
Dildo
Hair brush handle (round)

use KY or Astroglide with them all.

Pretty simple...
My fingers
Banana (with a condom...so hot)
Cucumber
Pen

Just about anything that would fit without any sharp edges. I beat off with a toilet brush with a perfectly shaped ribbed handle up my butt only a half hour ago.

I wish I could stick my cock up my own ass. Maybe that's reserved for heaven.

where to begin

trophy top
kite string handle
fingers
candles
markers
2 different plunger handles (smooth and the one that has a lot of ridges, mmmmmmmmmm)
shampoo bottles (lots of sizes, small to really large)
beer bottles

pretty much anything that will fit up my ass and feel really great. great topic, i need more ideas of items to stick up there.

Try it. With a semi between my legs, I've worked on it and pushed it towards the hole: in fact, I got the tip touching the hole when I was thinner. I've squirted into my crack a couple of times but never managed to penetrate the hole.