Little mutations.

Stan Persone

Vaginamouths.

Sab

i like smaller things like, lipples, well, extra mouths anywhere really, cock tongues, more nipples, things like that :P

drognarus

Multi-legged mutations with giving the perk to self-fucking!

Andreas

Something like having hands instead of feet and more vaginas/two cocks(not erect).^^

throwawaygirl

When I was a kid, I thought it would be really cool to have a second pair of hands instead of feet. So convenient! (In retrospect it would not really be that convenient, I think I'd just like four arms please. I've been getting into synths lately and I want to be able to play and turn the knobs at the same time.) But, I can imagine still some nice things about the hands-for-feet concept. Like imagine laying on your back and still being able to fondle your friend… but having your hands free for your own boobs :3

Growing Troubles

extra facial features and fingers + toes

Skrimish10

(This might not seem subtle, but the thing I like is the subtle shape of the arm/leg/hand/foot being symmetrical rather than just a left/right leg/arm/hand/foot. It looks so beautiful!

Skrimish10

I love middle legs/feet/arms/hands (and breasts! but middle breasts are hardly different xD) because they are unique; you would never see them on a normal person! I love the symmetry! I would really like to see more middle arms and hands, maybe on a tripod girl with 3 breasts and 3 eyes too! The middle hand would have 2 thumbs, 2 index-ring fingers, and middle finger, with the thumbs on opposite sides of her hand, and I think the middle arm would come out right between her shoulder blades, in the middle of her back, right below her neck. Would look gorgeous!

Bill Barrymore

I would concur with extra/fewer of the extremities or facial features. Three eyes, or maybe hands with two thumbs, or unusual things like that

FlexibleAnatomy

As a fan of contortion, properly double jointed limbs. Arms, legs, even a spine that can twist, bend, and fold up in any which way, beyond what can be reasonable for even the most flexible normal person.

Two irises per eyeball

triforce-omega

Extra nipples is always great

Boobs vore or extra genital part :)

haelahae

Little Mutations are my absolute favorite. Ideas include (but are not limited to): Multiple Fingers/Toes/Eyes/Mouths/Tails/Irises/Vaginas/Nipples, Digitigrade Legs, Hooves, long tongues, split tongues, prehensile tongues/tails/tentacles/hair/penises, split legs/arms, pointed ears, unusual skin, weird hands/feet/eyes, Lipples, mouths in different places, eyes in different places, gills, webbed fingers/toes, multiple joints (not the drugs), Palmmouths, natural high heels and unusually shaped nipples/areolas.

aabsurdity

One I have seen that looks very pretty is a face with one eye on one side, but the other has to eyes spaced closely, one over the other. I think that if the single eye wore e.g. purple eyeshadow, and the paired eyes wore e.g. one red and one blue, that would look excellent.

Rixas

Extra Toes/Fingers/Fantasy Ears

Vices

Inverted nipples that pop out when erect.

MyLifeIsAnRPG

Tentacle hair is another good one.

MyLifeIsAnRPG

Maybe a longer pointed or forked tongue. Different eyes like slitted or cat-like eyes. Gills.

Furka

Fingers and toes are fun and hard to notice unless you pay attention. Extra nipples too!

MirandasDream

Six fingers

Master of Muffin

Crotch mouths and lipples aren't things you'd notice without looking or hearing them speak

MyLifeIsAnRPG

Pointed ears. There fingered hands or three to two toed feed. Built in high heels. Claws. Fangs.

Ian MacLaren

Fusion. To someone who doesn’t know better, they would look like one normal person.

Faleridu

Maybe a few extra fingers, extra eyes. Ears