Thank you, your english is really good, and until now i understood everthig from you

Not everything sounds childish, just in some really small cases.

And i think that this has nothing to do with you gs knowledge
These are just human reactions. This is normal.
And i don´t know why some people has to react like parents or old wise people. Sometimes they need some humor. And thats what i like at you. You are humorous guy. Even if you are stressed.

So please people, try to understand some people and don´t feel offended.