It does NOT... They come with thorough cleaning/maintenance instructions. Certain Realdoll models even have removable vaginal and mouth inserts to make it easier for cleansing post-use. Mild soap and proper drying is all it requires if memory serves correctly from their factory website / FAQ... For the ones where the vagina isn't removable, you obviously need to either get it into the tub or a large wash basin I would guess...
Owning a real doll is a big investment. You will need to buy:
* Wheelchair: It will be much easier to mover her around your residence
* Clothes: You will want to dress her up for different occasions
* Makeup: Will add a nice touch and much needed change
* Friends: Chances are if you are really into your fantastic plastic gal, you will want to buy another to keep her company
* Shower: You will need to build a new shower with hooks and chairs to accommodate her
* Computer/Ipad/Cell: She will eventually need a device to communicate with you
* TV: in the event that she does not like to watch your shows (sports, guy movies, etc.), she will need to have her own TV to view her shows
* Shoes: Women, whether they are fake or real, will need at least 50 pairs of shoes
* Purses: See "shoes" above
* Birth Control: It will be challenging to get a prescription for her, so you may have to hit the black market to get birth control pills. That is, unless you are looking to start a family then good luck with that
* Family: Conduct a background check as you do not want to have her real doll brother (drunken welfare model) show up at the door one day. Also, beware of the psycho mother in-law model
* Jewellery: Special occasions (Valentines, birthdays, anniversaries, mothers day) come fast and quick
* Food: Some girls have particular tastes and if she fancies lobster, caviar and fine dining, be prepared to have a large grocery/restaurant bill
* Activities: Many love dolls enjoy spending time at the gym. Yoga and mediation is a favorite
I kind of got off track here so ravencroft is correct, you may need a large wash basin.