Questions for Japanese

[lekimtoan]

Hi every one here.I have a question for help.
I need to know that is it true if you smile too much in Japan,you would be consider silly (?)
In my "smile"topic ,a friend wrote that .

[spointo]

can't believe no one responded to this...

anyway...i live in japan and I have never ever ever heard of this before...ever!

[MissLT]

Not many Japanese here. We, non-Japanese, don't know if it's true or not. That's why....

[lekimtoan]

Anyway, thanks for your posts.It's really very long to receive your reply .However, your answer made me happy.