Growing up male demands the rejection of everything feminine, in order to gain admittance into the masculine brotherhood - becoming a man among men - a privileged position. However, gay men do not reject every feminine attribute, and some other men - particularly straight men - often ostracize them and punish them for this.
The dangers involved in hitting on a straight man and the risks of humiliation, verbal and physical harassment can actually add to sexual arousal. Look at the Madonna and Britney Spears kiss.
People who identify themselves as sadomasochists mean different things by these identifications. Yet there are still some social barriers that refuse to budge - especially for those people who aren't entirely sure of their own sexuality. Whenever I hear the label 'straight-acting', I cringe because to gay men, usually it really means 'acting masculine'.
If you have unresolved issues with your father, go to him and work through them. In short, this study would suggest young people are feeling less and less straight.
If one of them did return their interest and became emotionally available, that would confirm that they are gay and force them to deal with all the issues of coming out. We've all been there. Arousing a straight guy may suggest consciously or not that you're special enough to win his affection.