No, it certainly isn't normal; being gay is not the norm. But that is not to say it is wrong, indecent or bad. It is natural, for some.
Don't worry about what others think, say or do; be yourself.
Now I guess you are going to have to 'splain' that one Lucy, please.
I had always been under the impression that "straight" (as in heterosexual) was the largest group of sexual classification, but I am willing to learn.
It's normal. Other people like other things, some like one, some like the other and some like both. Some like none at times as well. What matters is that you like you and you should like you. :)