I may be crucified for this but...
I once obtained a cuckoo clock back in my college days. Not on a trip to Europe, I don't even recall how or where I got it - maybe at a garage sale. But it seemed like a very cool thing at the time, it would certainly make a unique addition to the decor in my dorm room, and I figured it would impress any girls that saw it (that was of course a major motivating factor for almost every decision in those days).
Sadly, it did not have the effect on female guests that I had hoped it would, in fact, it seemed to have the opposite effect (maybe I was just chasing the wrong girls). My room mates quickly grew tired of it, and even though I thought is was way cool at first, the novelty wore off pretty quickly - the damn thing would go off every hour, day and night, it was loud, and it didn't take long before my friends threatened to smash it, and I grudgingly agreed they were probably right. I gave it away after a few days, to everyone's cheers.
Cuckoo clocks are charming in someone else's house. But you really do not want one anywhere near where you sleep, or (even worse) where you're hoping for romance. In my experience, a little Barry White or Al Green played low creates a certain mood. But a cuckoo clock going off unexpectedly nearby will elicit a very different and incongruous reaction from a prospective romantic partner, which will REALLY mess with your game. Trust me on this.