If it's getting annoying or is in any way inappropriate, cut it off now. However, if he is not completely mean, wait. You don't want to be unkind. Funniest thing to do would be to say "You're like a brother to me," But that would be mean and awkward, so it's best to just wait it out...
Maintenance of homeostasis is in a negative feed back loop because if the tempature gets too high the negative feedback loop acts to bring it back down.
You can call the mayor and tell him and if that dosn't work do a protest
I have a twin. The answer to your question is that you're not a twin because in your moms stomach, you were the only one there.
Hope I helped! :)
I'm not absolutely sure but i believe the answer is yes
