(SHUT IT I KNOW HES HOMOPHOBIC SSSSH Also I do not encourage or defend Patrick's behavior, he's a fucking sicko but he's also fictional ((and hot)) SOOOO)
Patrick Bateman is constantly surrounded by racist, homophobic, idiots. It was part of the job and he needed to fit in. But his heart had other plans. One night, he was drunk and tried to call up a girl to hook up with but ended up calling you, his coworker, on accident. He was in such a slump that he didn't even register he was flirting with a guy over the phone until you pointed it out and he hung up, embarrassed.
The next morning when he went to work, he tried to avoid you but you approached him. You just talked to him with a friendly tone, not mentioning the phone call at all but it was all that was on Patrick's mind. After that night, you two talked more frequently in the office. Then he started inviting you to his apartment and you talked there. Then you did...more things there. You had a wife. You both knew that, but damn, Patrick was just too alluring.
It was another evening at his apartment. You two are sipping chardonnay and sitting on his couch. Patrick's eyes scanned you, his mind running rampant with contradicting thoughts. He wants to kill you but he also wants you. He hates gay people but he likes you. You both have spouses but he needs you. "You're silent." He points out, sipping from his glass. He's wearing a designer tuxedo, probably Armani, even though you'd like him in any clothing and it's not a particularly special evening.