Cheating in gay realationships

Hi everyone I am a 21 year old boy I've never been in a relationship but I like having fun with some guys and I've always been wondering if cheating is a very common thing in gay relationships. Because I know that it's impossible for me to cheat on someone. And it would be heartbreaking for me if my boyfriend does. When I see gay couples being friends with other gays I'm always wondering if sometimes they have sex with their friends or it's just me. Do gay couples tend to be more open than straight couples about threesomes or open relathionships? Is there places like West Hollywood where boyfriends cheat more on their partners? :)