Y'all are think too deep about this. Phil grew up watching late 90's wrestling, so gay jokes, evil black men and big titties was probably the way he thought people interacted and carried it into his mid 30's until youtube started demonitising videos with gay/sexist/racist jokes.
That's it. He's not gay, or scared of his wife, he is socially inept and frightened about losing his ''job'' which funds his addiction to wrestling j-pegs.
EDIT: Spelling
Its not that phil did X thing so hes gay, its that every time phil has the freedom to do X, Y or Z he
always chooses the gay option. Just look at his first "hot latina" story.
https://www.youtube.com/watch?v=PH4GU0r_HVU&t=1162s
Ex Boyfriend; black stud, tall, mature, looked like a football player, good looking, not overweight, model good looks, big dude on campus, alpha male, part of the masculine in-crowd, described phil as hot
Hot Latina;
thinks her name was Venessa, hot latina girl, only girl with big boobs in school, big ass, pretty face, you could tell she would grow up to be hot
one day
Its phil so obviously this is all bullshit, but its pretty gay in his made up story he spends way more time and gives more detail about Black Stud then he does about Hot Latina. Also something of note, the character saying "Phil is hot" is the big buff black dude. Weird that Hot Latina never complimented phil, but instead phil had to overhear a private conversation where the masculine stud was trying to convinces other alpha males that his ex was totally into phil and that phil was totally hot. If your straight and making up a bullshit story you think phil would over hear the Hot Latina talking to all the hot cheerleaders, but I guess fantasizing about the football team complimenting your body is totally straight too.
Once agian its not that this one thing makes him gay, its that every time he tells a story like this he does it in the most closeted way.