(Female bisexual) It’s a little bit different from straight ones. Especially in certain environments, I have to constantly re-access if it’s worth it to make my relationship known. Out at brunch in a fairly liberal neighborhood, it’s probably going to be ok to refer to that person as my girlfriend (or wife), to be kinda cuddly and holding hands and greet each other with a kiss, just like straight couples. But at work, especially if the boss already doesn’t care for me that much (and thus could use things like “is incompetent at job” to find a legal way to fire me), maybe it isn’t, or maybe I need to ease my boss and coworkers into that, and I have to consider if the political stance is more important or my ability to pay my rent. I also don’t have as many role models for what healthy relationships look like, and for who does what, and I can’t just assume things. For example, women are normally taught to flirt but not technically make the first move, so there are lots of times where both of us will be playing with our hair and bra strap, gently touching the other’s arm, all that stuff, but then neither will actually say the phrase, “Would you care to get dinner with me some time?” Or for if someone’s going to stay home as a parent, you just know that’s going to be a conversation, not something you can assume at all (whereas some hetero couples do follow traditional gender roles).
You also are with a partner who has certain shared experiences with you that you don’t have in a straight couple. I never have to explain to a female partner why she shouldn’t assume that if there’s a problem, I must be PMSing. Or, how often I worry about rape, and how that effects my behavior; even if she looks at rape differently than I do, it’s not this largely foreign concept to her the way it is for almost all of my male partners. And sometimes, you can share stuff, like clothes, hair products, jewelry… I have yet to ask a male partner if he’d like to wear my green chandelier earrings and then have that turn into sexy times.