Just go easy and be careful what you shove up your ass and use plenty of lube. I'm gay, been with guys that had a bunch of hemorrhoids from not being careful. You only get one asshole in life, so to say, and it can be a lot of fun for decades and decades, straight or gay. Whatever, please don't shove glass things up your ass. I just can't believe some people do that. Once in the hospital we had a guy with a large glass coke bottle up his ass. I can see getting excited, but that is not very bright. Also, shot glasses have ended up in the ass and there are some cases of cement and also light bulbs. These things can break and you end up with an ass-full of broken glass. Going through that is absolutely not necessary.
Also be careful of dildos with heavy solid wires in them, like the bendable ones and also ones that attach internally to things like throbbing/twisting heads at the end. I was once having a hot time with an electric vibrator and pulsing/twisting dildo head at the end, like a big cock head. It was long enough it had just passed through my second sphincter and it was fun. Damn, when I pulled the thing out because it had quit working, I saw a large heavy solid wire poking out the side of it, it had been attached to the head and the motor at the base, it had broken loose and come out the side of the dildo about 1/4 way from the end.
I panicked, I thought I had punctured my intestine. I called the gay health center, they said never use dildos with heavy solid wires in them, and asked if I had any blood, I said no, they said I was lucky, never do that again, and to go to the emergency room if blood appeared, it never did, I was lucky. Just as a note, sometimes if way up you can injure yourself and there might not be blood, and it can be extremely dangerous. So, all of this is fun and can be done safely, but one has to do it the right way. Peritonitis is no fun at all and can be fatal.
Some sex toys are cheaply made, and that was one of them. Just be careful, there are some really cheaply made ones out there like the one I had, even though sometimes they cost a lot. There is also a kink store in Boston that is excellent for kinky stuff, I've ordered a few things from them.
Asshole play can be a lot of fun if done safely, and fortunately with the internet there is lots of help, of course, everything on the internet is not always true. There are some great knowledgeable people in this forum that can help you out as you go along.
Ha, I once shoved a large sausage up my ass. I was traveling and very horny, so stopped at the grocery store and got a really long and large sausage, some bread and mustard like I was making a sandwich. I got it up my ass fine, and then realized it was HOT sausage. It burned like hell. I had to manage to get my ass on the bathtub spout in the motel room and clean it out some with water. It was NOT fun, it really burned.
Grocery stores always have interesting things to shove up your asshole. Just be sure to really clean them well first, because sometimes vegetables and stuff have germs on them, etc.
Whatever you do, go easy, there is no rush, you have lots of time. And be careful, since the nerves on the inside of intestines don't always register pain/damage. Any blood means stop. Just be careful and you will have a fun time with your asshole for years and years!
I just said all of this because I'm a gay guy that has a very horny asshole, so I've had some experience doing some real turn ons with assholes! LOL! And, this is not just a gay thing, lots of very straight guys have fun with assholes. As one of my super straight friends once said, hey, if it feels good, do it, who really cares.
I've done the pipe insulation thing too. It always gives me gas, maybe something in the foam? Some of the long dildos are far better, and they have rounded ends and are flexible. I had a nice 1" one that was fun. Be careful when you go up high, the pain sensors in the intestines are not sensitive, you can read about it some on the internet.
Have fun, I wish I could help you in person. LOL!!!