There are other things you can use around the house if you can't/won't go and buy butt plugs. Just head for the kitchen ...

See that wooden spoon? The one with the long rounded handle? Make sure that handle is very, very smooth, brush some oil on it, and - there you go! Use any length of it you want; it's got a nice round end that won't go in! And as a bonus, you can use it later for a spanking!

Oh look, a whole drawer full of butt plugs! Yes, those plastic tools cooks use - the spatula, the thing for flipping eggs or pancakes - all with smooth plastic handles, even though they aren't round. Nice thingys!

And don't forget the turkey baster. That long hollow plastic thing with the rubber bulb on the end. It slides in easily (when oiled), has a bulb to stop it going too far, and can be used other ways too. If a person is put over the back of a chair with their heads down, and butt high in the air, a funnel can be put in place of the bulb, warm water can be put into the funnel, and a type of enema can be given. This can also be done in the bathtub for a first timer.

gotta go ... fun is calling