These people choose to hide their sexuality from the public or they can choose to tell the public. However, I'd be one of those celebrities that would hide it from everyone. The public has no right to know nothing about me unless I want them to know.
I know some are trying to hide it not to get their career destroyed. It is a pity it's still a necessity in some areas of being a public person. How successful they are, or aren't isn't that important as long as they can promote their public image. Still is a shame. :-/
Truly I don't know.. I must be a bit strange cos wondering what someone's sexuality is isn't the first thing I think about.. people is all just people to me
Some people (including celebrities) choose to cover some aspects of their personalities (including their sexuality). What other people think is up to them.