Generally, it's not a problem just because of the simplicity of our existence. As far as I know, I'm the only one here capable of physical intimacy, and the only real problem presented with being in a relationship is that Umbrian Reiori and Jack tend to focus their malice on my girlfriend, which in all honesty is potentially very dangerous, but I've gotten quite a bit more control over them in recent years (or perhaps just getting out of high school cut out a bunch of stress sources; sometimes right before big projects are due at the uni, they pipe up again), and their outbursts have decreased sunstantially.