Why would anyone in their right mind allow Riker to show a "female" of any species around the Enterprise? We even had an androgenous species and still he formed a close relationship with one of them (gay tendancies perhaps?). If I was captain I'd not let Riker anywhere near a visiting female, in fact I'd have him put off the ship. I'm surprised with the writers of TNG that they allow such an obvious infraction of the Prime Directive to occur given that Riker keeps sleeping with any alien within a hundred lightyears. In fact, his behaviour is now so predictable in any episode invoving a female alien, it's tedious.