Cacophony of Noises From Apartment Neighbors

When you live in an apartment building, you are aware of the privacy you surrender. Often you overhear other people's conversations, the low rumbling of their water running, the murmur of their T.V., and the buzzer on their dryer going off. You likewise try to remember that they can hear the same noises coming from your apartment, and inevitably fail until the moment right after you've done or said something you wish could remain private.
Anyway, I understand this and (sort of) accept it.
If I didn't care about the noise, I would leave my windows open all day long, year round and never use the air conditioning because I prefer a natural breeze to re-circulated air. Last night we left the windows open, and it was a perfect 70 degrees in our bedroom. I fell asleep to almost complete quiet. And then...
One of our neighbors started having the loudest and wildest sex I have ever heard. I can usually sleep through anything, but this jolted me awake. I mean, at first it sounded like I was watching that scene from When Harry Met Sally at full volume in my bedroom. Except it went on for like 25 minutes and at times was so cheesy it made me laugh in my sleepy stupor. This was at 12:30am on a Monday night. AND AGAIN at 9:15am. I'm not mad ... it's hard to be mad when someone out there is having that great of sex, whatever time it happens to be at. It's more like I'm incredulous as to WHO is having this sex. I mean, maybe I'm just a big prude, but this sounded like unbelievable sex for so late on a MONDAY, and then who is still home at 9:15 in the morning on a Tuesday for round 2? I don't think any college students live in our building, or else I could easily dismiss that one.
The weirdest part about all of this is that these are not the noises I had already become accustomed to and annoyed at in this apartment.
There are several people near us with small children, and I think some of them are at home with a nanny during the day. A nanny who, apparently, lets them scream at the top of their lungs for hours on end without calming them down. And then there are the kids who wake up singing/shouting the ABCs at 7:00am on Saturday mornings.
There are also a TON of young professionals living here, and no one gets cell phone reception in their apartment. Thus, lots of telephone calls take place on balconies in the courtyard, which our apartment faces. I hear a lot of Drs./residents(?) and lawyers talking about work to (presumably) colleagues.

So, our apartment building is some weird mixture of sexual exhibitionists, screaming children and young professionals. I wish these people would keep their windows shut, but you can't really demand that. If I feel particularly vengeful, I can leave our windows open after Uno is born, but that would probably just bring on a wrath that I can't even imagine. So I guess air-conditioning it is.