[Luckily, that's not actually a risk with him. The only way for him to catch an STI would, counter-intuitively enough, not be through sex. Not enough bodily processes to enter anything but actual blood into the bloodstream.]

Unless they do a general health sweep when we come here, which considering what all they can do I wouldn't be surprised if they do - nothing that keeps people from having sex faster than cholera and syphilis - anyone could be a spreader, no matter how many people they've slept with here. [But that's by the by. He agrees with Rowan that it does, in fact, seem to be safe here.]

Me as well as you. But who am I to look a gift horse in the mouth, right?