The dialogue that followed went like this:
Marianne: What on *earth* is that sound??
Evita: Sounds like a spring peeper to me.
Marianne: A what?
Mike: A spring peeper.
Marianne: What's a spring peeper?
Evita: A type of frog.
Marianne: That sound's coming from a frog!?
Mike: A mating call probably.
[Pause. Mike swoops his head over to look at Marianne]
Mike: Doesn't that just make you want to mate...with a frog?
Marianne: No. It doesn't. And it doesn't make me want to mate with *you* either!
At this point, Marianne and Evita were both chuckling, which erupted into full belly laughter as Mike puckered up his face and let out a high-pitched, best imitation of the suspected lover frog.
Evita: That was a YouTube moment!
For your information, Marianne, Evita, and Dave looked up spring peeper calls on YouTube later that night, and decided that the love-struck night-disturber was not a spring peeper, but still likely a frog of some sort.