The (nonexistent) discrimination against straight people.
Seriously this is like saying white people are discriminated in the United States. Complete BS.
Man one: Hey Paul, don't you think that person over at the bar is a bit of a Hetrophiliac.
Man two: What do you mean?
Man one: Well this clubs pretty full of gay blokes, and yet he's been trying to pull almost every straight guy that's come in her tonight
Heliophobia is a phobia in which the sufferer is afraid of sunlight. People have it for a number of different reasons. Some people have it because of traumatic experiences with sunburns or cancer, scared they will get bad sunburns or skin cancer. Some have it because they are scared of the sun crashing into Earth. I, myself, have the phobia because of the second reason.
For heliophobes, they LOVE cloudy days, due to no sun. Some hardly go out, and others don't go out at all. It differs.