Thanks, but no it's not trusted issues.
Given my own personal experience, and from talking to straight couples I know, as well as same-sex couples that I know, I think it might be a gay vs straight thing. All of the straight couples I know need that time apart because their differently gendered partner makes them nuts after a while - - and all the gay couples I know (Mostly other lesbians) - are happy to be with each other all the time. I mean a night out with the girls for us, is still a night out with each other (and friends).
We're each other's best friend and EVERYTHING is just better when we're together. Now that said, we spend every night together on separate computers - doing our own thing - just in the same room where we can talk to each other if we find something online, we want to share. We don't leave the house without each other though... well except obviously when she goes to work.
But hey, thanks for the judgment.