It's not about gay. Many straight men enjoy anal stimulation. The prostate is very sensitive and it causes longer more intense orgasms. Kids just do what feel good.
I dontt think it means he is gay, and I don't think you should tell him it is "wrong". I would tell him he could injure himself, and could end up in the emergency room, so its not a good choice to do so.
Don't tell him its "wrong" or "not right" just rest it. As you would him putting his hand on a hot stove.
Not normal! Maybe he's experimenting, but you should tell him that it's not right.
Ask him where he learned him from, investigate. Seek for answers, bc they might be signs of molestation/sexual activity.
Not only is it not normal to stick objects into the rectum(the rectum is only for releasing poop!!!) it can become an emergency.
Hundreds of people land in the ER with objects launched in their rectum. The rectum has a suction to it, and if something gets into there, it will suck it up higher, and that's when you'll end up in the ER.
So tell your child it isn't normal.
Not really normal but I do not think that homosexuality is where your mind should go on this. Look up child hypersexuality! It is also a common clinical symptom of bipolar disorder.
I wouldn't worry. He may just be experimenting with his sexuality. He isn't to young to know if he is gay or not. Dont be mad at him either for just experimenting. If he ends up coming out to you as gay. Accept him for who he is