Why do people keep believing that Kevin Spacey is not heterosexual

Question

I can't figure out why everyone is so convinced that Kevin Spacey is not straight. He has had relationships with 2 women, one being Helen Hunt (they met on the set of "Pay It Forward") 

He has repeatedly refused to discuss his sexual life, except for the rather OTT interview with Playboy in 2001! 

I just don't understand why people insist on saying he is homosexual

Any thoughts?
 

Answer 1

This:

Article

Comments

It hints at it, but there's no one who has come forward to say "I'm a guy & I had *** with Kevin Spacey!"

I still would like to see more proof