I have never felt the need to come out to my parents, I don't need to know about their sex life anf they don't need to know about mine. If me and my parner were to split up and I was to start seeing a girl, that would be different, but it would still be no concern of their's.
Bi-phobia is just as peverlent as homoaphobia but not as well known.
Found this website which does deal with the problems
Bisexual ButterflyThankfully for the most part I've never recieved anything like phobia (fingers crossed it will last) as its all ways just the minority screwing it up for everyone else who just wants to live there lives!