This won't become a Den of Iniquity

Is basically what I told D if he let some person that he met thru the casual sex ads on some online dating site come to the apt.

I was wondering why he was being extra nice and washed his dishes(which'd been sitting in the sink for last couple of days) and cleaned the oven top, although I attributed it to the fact that I talked w/ H for close to 3 hrs yesterday, and she told him that he'd better start pulling his weight around the apt. But apparently some girl replied to him in one of those online dating sites he goes to (I thought so that he could mock the ads and/or play yo-yo w/ his self-esteem). So when he first started talking about the girl replying, I was like "huh, well whatever. That's nice you're going to get laid." Then when he said that the girl said that she had prudish roommates and thin walls, I'm like "So what?". Then he gave this look, and I'm like "Hell fuck no, you're not bringing her over!" And he's like "why not? I'll only bring her over when you're not here." Like dude, I have tons of expensive stuff, and I'm not letting someone steal it. Someone always has to be watching her. And he's saying "Oh I'll be with her all the time." Yeah whatever. Like he's going to follow her to the bathroom, after he came a couple times. (not that I actually said that. Neither did I point out that considering that he's had bad luck w/ attracting women, the fact that someone's paying attention to him will mean that he'll be too giddy to notice anything. And he's not observant in the first place.) So I told him that I'm letting the apt turn into a den of sin, and I'm the prudish roommate here. So he's all pouty and goes, "so you're not letting me have anyone over?" And I'm like, "I don't trust these people, I don't know these people. You could've had Z (mutual friend) over, and it'd be awkward in the morning but I know that she wouldn't touch anything. "

And really that's that. She could be some streetwalker, drug-addict, kleptomaniac, sociopath, who knows what. And I have lots of easily pocketed stuff around. Hell, I don't even like it when the building caretaker comes over, and the guy's in his 60s. I may be overprotective, protecting the nest, but dammit, there's a hotel on either side of our building. Frigging pick one.