Ya sure but we can also fuck other women and have cuter nicer girlfriends.
Getting it when we want ("variety") unfortunately most still cant control but many adapt
But how do you know that your girlfriend is "nice"? She might just be using you and is really into your BMW with it's sexy and bouncy rear suspension and leaky shocks. But on the bright side - if you get a custom exhaust system with a really big tailpipes - you'll be able to dump your girlfriend for somebody even sexier.