World building idea where you have a bunch of tentcales piles hidden in holes or on ceiling in your city so if people aren't playing attention they get grabbed up and brought into the tentcale to either be milked or bred. They're hard to get rid off, as once they capture someone they can fill them with small to medium sized eggs to incubate, and let them go their merry way to spread the hive. But some have been know to keep people longer then that, keeping them bundle up in the tendrils and keeping them as a personal incubator.
Most of the time you'll be saved in around 6 hours, most people suffer from swelling in the chest, mild lactation, expanded cock and balls or enlarge pussies, and a desire to return to the tentcales, thankfully it should all go away in a few hours. But prolonged stay in the tentcales lead to permanent affects, and removal of people from the hives require a doctor with how interwined you become with it.filled with eggs and milked for all you have, mind being replaced with nothing but being a good incubator. Some people have been found to grow the longer they're in there, like they're adapting and accepting the changes the tendrils are giving.
Worst case was when an entire apartment was infected, whole building was one big tentacle hive, filled to brim with people, constantly getting their breasts milked, cocked milked, or holes filled with eggs. The air heavy with pheromones. Took weeks to clear it out
Anyways, that's some thoughts