Probably the handle of a 19th century billy club. It had a ridge about the size the ridge on the handle end of a baseball bat, then handle with circular grooves for grip, then another ridge like the first one. About 8 inches with both ridges inserted. It felt great going in, and even better being pulled out. The working end of the billy club was smooth and rounded, not nearly as stimulating.
Later, the leg of a three-legged stool in the dormitory shower, turning the stool upside down and sitting on the upturned leg, then rising and lowering myself onto it. Quite nice.
Also a hairbrush handle that looked like it was designed for the purpose - looked like a douche nozzle but several times as large. Very nice feeling.
Once in a hotel I really needed something. I was using very large felt pens, perhaps 1 1/4" in diameter, so I wrapped it in layer after layer of toilet paper, put a plastic bag over it and used half a dozen rubber bands to secure it and provide narrowed bands. Result was about 1 3/4" in diameter. I had a hard time getting it in, but it felt great once it was in. I gave a lecture to a conference group with it in place. I was missing one color as I used the other pens to illustrate the lecture, but it turned out ok.
My, how much more convenient it would have been to find a lover with a nice penis. It was said of Julius Caesar that he was every woman's husband and every man's wife. Sounds like a good life. Perhaps we are transitioning now to greater freedom to love and make love to either sex.
I have found a new thing, a double-balloon enema nozzle without the enema. As the balloon inside your rectum expands, it gives a nice, stimulating feeling. Of course, it is also just as nice with an enema.
And, oh, wetandwild09, that is a classic! Orchids and karma to you.