I’m assuming the same way we decide which animals are okay to eat or not - arbitrarily and by culture. For example, maybe some Pacific tribes of mermaids might be fine using starfish, but Atlantis area that would be considered barbaric, perhaps even with a touch of propaganda saying they use starfish for sexual reasons as well. I love where this is going, I’m gonna go write a controversial AO3 fiction about a Pacific mermaid fighting against Atlantic racism, but secretly in a degrading race-play relationship.
I’m a total removed, the only thing women need to have is the slightest sliver of affection for me and I’m spreading my wallet like a child spreads nutella on bread
I’m sure there are some downsides. For example, uh, there could be… some risk of chapped lips with the extended physical activity if you don’t hydrate enough.
“Now you will experience the FULL POWER of the slut side”
claps cheeks