I thought a douche washed inside the vagina, not round the outside. Douches are definitely for the obsessed, so is determined scrubbing of the labia with strong cleanser - symptomatic of guilty conscience, IMO!
I see no problem in giving that area a quick wash with a mild unperfumed soap or gel and then rinsing it off well. A lot of the fragranced shower gels are just too strong for the sensitive skin there so why not use a specialised product, if you want to, but any unperfumed product from a trusted manufacturer should be OK.
Special skin creams for the oxters? Only if you have more money than sense.