There must be an exhibitionist tendency that goes with homosexuality. It's all they bloody talk about.
That's not necessarily what they mean by "open;" it means if they show up on base on Monday and someone asks them how their weekend was they can say "I went to the lake with my boyfriend" and not risk getting kicked out.
Having been around a lot of gay men for a fairly long period during college I'm a bit mystified about the idea that they're constantly accosting or molesting straight men; or making out in public. I've never seen or experienced either.