I was thinking a mix between Love Story and the theme from 2 Girls 1 Cup.

Holy shit I thought the exact same thing, hah....

And we can't assume that all dogs would have the same taste either. My terrier happens to like swing music.

My first guess is it's bullshit. My second guess is that it's got something to do with high-frequency sounds. If you notice, near the beginning of the song, there's an odd high pitch whine that gradually gets higher and higher until it pops out of human register. I checked out a couple more of their SONGS TO RELAX DOGS BY, and they all have this same feature. So perhaps there's an ultra-high frequency drone here that dogs find orgasmic?

That high frequency whistler was like a pin being pushed into my ear drums. Wear headphones, and you'll notice the sound moves around. I presume this is to get the dogs attention, and the foolish owner thinks "Oh look the dog is looking at the speakers, it must really like the music" just like the old RCA record logo.

wheeeeeEEEEEEEeeeEEEEEEEEEEEEEEEEEEEEEEeeeeEEEEEEEEEEEEEEEEEEEEEEE EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEEEEEEEEEEEEEEEeeeEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEEEEEEEEEEEEEEEEEEEEEEE

You pussies need to listen to some hardcore synthesizer music, that sine sweep was nothing.