Yeah, I'm gonna talk to him the next time I see him. I haven't decided though whether to fist bump, wink, say "niiiice, but for realz, keep it down" or just mildly complain about the noises generally, and nicely ask to take it down a few notches.
I'm only worried about him secretly taking issue with it, and being quick in the future to complain about any noise coming from my place. Whether it's people, TV, loud farts, or whatever. Depending on what type of person he is (petty or not), I might be signing out of a tolerance agreement here.
There is one other solution though: finding a way to break the couple up. That doesn't sound selfish in the slightest, actually it sounds like good TV.