You guys might be interested in this one? Female lead essentially has a netorase fetish and she likes to give her "bf" to others before she "takes a bite" out of him.
It's kinda a harem? Biggest downside is that it's a shounen manga and not a real erotica. Thus the theme is toned down and analogous: MC and FMC aren't actually dating but do like each other (as is common in shounens), no one does anything explicitly sexual, and the girls are vampires and wolves. FMC is into other girls "taking a bite" out of MC and then biting him herself. "His blood tastes the best right after someone else has drunk it".

Anyways, not quite a harem nor that explicit, but I figure those that like harems, might be into reading about this cuckqueen and how she enjoys her meal time.