I dont understand why my big brother wont tell me he's Gay why is that?

My older brother is so ******* cool we hang out usually on Fashion Ave or whatever. So my cousin is a clean fashiony guy who always wears tight clothing and always has hott females around him. He also has a tender voice to him. My dad always bashes on him behind his back. At first I didn't belive my dad bec. Their are guys like that who are straight(taz arnold,prince,young mick jagger,etc). So I was like well lemme ask him myself( to me their is nothing wrong with liking another ual preference) so I asked him in his car and he looked at me and said "huhhhhhh... .....Mike". I really couldn't tell what his expression was but he was quiet and it was ackward so I changed the convo .. But. I was wondering why you guys think he didn't say anything I told him I would keep it a sec