Their names comes from both their peculiar natures, and the fact that they are often found living in the rafters and corners of houses of ill-repute.**
The whore-spiders have the ability to transform themselves temporarily, into any other arachnid and (gods know how!) successfully mate with any member of that particular species. The whore-spider itself is androgynous and pansexual, able to take on male or female forms depending on whichever "mates" are available in its vicinity.
Once a "victim" is identified, the whore spider approaches the creature, looking exactly like its mark's ultimate object of sexual desire, and begins its mating "dance". No arachnid of any species can resist this bizarre advance. Females will immediately go into heat, males immediately become hopelessly aroused. The whore-spider then mates with that creature and crawls off, its weird mission accomplished, reverting back to its original form.
If the arachnid the whore spider mates with is female, that creature will give birth to a mixed brood, in its own time. If the whore-spider's mate was male, then the whore-spider itself will go off and birth an equally mixed brood. Ninety five percent of the spiders thus hatched will be quite normal members of that respective species. The other five percent will be born as androgynous whore-spiders. Thus they propagate.
As far as humanoids are concerned, the whore-spider is ambivalent and oblivious most of its existence, much like a regular spider.
They possess fangs and can bite if molested. Their venom is rather mild however, causing only temporary migraines and muscle aches in most humanoids.This is followed by an influx of nitrate oxide into the blood stream, "arousing" those that are bitten for a short while.
The whore-spider's diet consists of the very same things that a regular spider's diet does
Alchemists prize the whore-spiders' shriveled molt. The dried, shed husks of these creatures are used as ingredients in countless of experimental concoctions, from love potions to more powerful magical draughts involving transformation and illusion magicks.
In lieu of crafting webs, the whore-spider merely secretes a silken goo from its abdomen, periodically, simply to expunge the stuff. This "slattern-silk", if applied to flesh, will help kill any infection in an open wound, burn, or cut. It is for this very reason, that certain ladies-of-the-evening will keep whore-spiders as "pets" beside their beds, thus propagating the myth of the whore-spider's colloquial appellation
**The whore-spider can live anywhere a spider can live, not just whore-houses obviously, but alas, the common folk have named the creature and will now forever associate it with harlots. A creature that begs to be scientifically named, if ever there was one.
Additional Ideas (2)
The mutated offspring of a forced mating have a halved lifespans. During that lifespan, however, they are basically slaves to the whore-spider. They collect food, provide protection etc. They have partial morph abilities that can cause quite an odd shape when scared or captured. They are not able to control the shifting as well as their parents so often, if seen or captured, they twist into grotesque shapes of random spiders and bugs they have come across.
If birthed away, they are bold and brazen in trying to find their way back to the sire. They will wander aimlessly and not back down from any sized barrier or danger. The poisonous types of these are most dangerous to humans who are in their path as their morphing abilities often translate into survival skills and enhanced poisons.
When two whore-spiders meet, they fall into the spell of each other's luring skills and procreate till the male dies of exhaustion. During this intense workout, a non-sticky version of their webbing is constantly being thrown out and is twisted and strewn about. Sometimes, but not often, the spiders may get entwined in it and both perish. This thread is coveted for something...
Alchemists use their venom to make love potion #9? When found with the webbing....?
Love it! That's now officially part of the whore-spider canon.