I always found these extra sounds effects a detriment to images. Like graffiti writing over a Rembrant, broken hears and stuff to denote what each character is feeling.
Different strokes. Maybe it depends on whether you can read them. I for one find twitching pussies going キュンキュン♥ in hot pink a big turn on.
Besides, this isn't Rembrandt. It's pornographic comic art, where SFX to denote the action and environmental sounds are perfectly acceptable.
And good thing some artists decide to offer no-SFX versions of their art.