Giant

Giant - Size is 10 feet tall, enough for organs to fit a full-grown human in.
Likes: Masturbating and having sex.
Dislikes: Not having it.

Finisher:
Giant Kiss - like eating a lollipop. Deal heavy damage and charm damage.
Giant Suck - like eating candy before being spit out. Deal heavy damage and charm damage.
Giant Marshmallow hell - Deal heavy damage.
Giant's Dildo (after burying human in ground) - use human as meat stick. 1 hit KO
Giant Mating (temporarily shrink self to mate with human) - make one a slave. 1 hit KO

LOL I think someone can make an improvement of this one....

10 feet isn't tall enough for the things you are describing.

Easy fix, just add another zero.

I need it to be the size where it can still mate with people. 100 feet will crush the poor thing.

Go with 25-35 then. 50 tops

How high is 10 feet as opposed to 25-35?

About 15-25 feet smaller :p
10 feet is a bit less than twice the size of a person.

Fine fine.... Then 20 feet. That should make the smallest parts the size of a person...