I read in an interview, film director Ang Lee says he never asked the author of Brokeback Mountain, Annie Proulx, why she called it 'Brokeback'; he says, I was scared to ask her.

I think I often heard " I dare not ask..." and " I was afraid to ask...", but am not sure I've heard "I was scared to ask..." used in the same circumstances; are these three exactly the same?

Thanks.