OK, a few other posts here got me thinking of this poll, and I'm in a strange mood at the curent hour. Sort of surprised nobody else posted it yet, E being the bastion of weirdoes it is and that we have a BDSM quiz going, but whatever.
So, motive and background does not matter. They could be sentient aliens from a distant corner of the galaxy seeking to impregnate humans, an earthly mutation gone horribly wrong, something inadvertently summoned from the Necronomicon, or just naturally curious species that are very skillful with their tentacles. Who would actually try tentacle sex if it were actually possible?
I will leave this open to all, not just for the girls that might secretly desire to be plundered by a mutant octopus, as I guess deft tentacles could grip as well as plunge. This ought to be an interesting thread, LOL.