i understand if it is literally the same thing over and over, example:

can we get a pool?
can we get a pool?
can we get a pool?
can we get a pool?
can we get a pool?

but that is not what i'm talking about, i mean that people get mad when someone sticks to a general theme, such as list making or a certain topic that may contain repetitive themes, example:

i can say: i love cats. they are so much fun
other person1: yes cats are fun when they play with string
other person2:my cat loves his string
annoyed person:enough about cats already!!!!!!!!!

i'm just trying to understand why things like this can bother people so much and they feel the need for every conversation to go exactly the way they want it. the same thing happens when i say something "random" because i want to start a new topic (i wish real life could be like forums, where you can post a new thread anytime and not worry about interrupting).

is there guidelines in social interaction for when you can talk about something, how much you can, and how many times the topic has to be changed to prevent people from getting annoyed. someone seriously should write the rules down, or it is a free for all.