1) If their boobs are small (smaller than a b cup)
2) when they are talking to aa hot guy
3) when singing a solo in choir
4) when called on in class
They're embarrassed because if they know other girls have bigger boobs than them, they feel like the girls that have bigger boobs are better and more attractive than them. If that's not the case, then maybe they think their boobs are too big. I don't know... You shouldn't be embarrassed about how big your boobs are. 
yes, because girls mostly like taller boys!
He prefers that girls are smaller than him, otherwise he feels embarrassed.
Because girls are growing up. It is natural but it is unknown to them. I think embarrassed is not not the right word/
They love you, they're embarrassed, or they're tired
Because she's too shy and embarrassed. Some girls are like that.
I may not be able to answer this question from experience, for I am not a female, but i would say no. You do not need to be embarrassed about it. I am openly pan, and have had no problems with it, nor have other people. If girls are your gig, then go for it. You should not be embarrassed about the way you truly feel.
A doctor has pretty much seen it all, due to the fact that they are doctors they tend not to get embarrassed by that.
because they are to embarrassed to say no
Boys are open to burping because they think girls cant at all but the truth is girls can burp better they just hide it because they'll be embarrassed
They don't actually hate it they are just scared by it and maybe even embarrassed by it.
well girls like to hear what they like to hear... she is probably aggravated and embarrassed