Hi
I may have read to quickly your thrend on this.
But I have rasied a very large family of kids.
And let me say there was only 1 bathroom, 1tub, 1sink no shower... many kids to bath.
Not a probably when very young (both sisters and bros alike) in to same tub= 2 at a time even...supervised with audult or oldest elder child adleast 13 yrs of age watching.
I bathed with my boys (when babies) occassional one at a time in time with me up to 2 or 3 yrs old.
But now my girls...I think a father should let that her bath with mother's supervision and care....and 4 yrs old....no no no.
A good age to gauge little girls and give them their little respect is after well potted trained.
Girls/women bath different from boys/men.
Each must learn from role modeling (get my pt)
Girls learn much faster than boys and become very body conscience & in tune with their bodies faster.
A female is aware.
Girls also have an innate nature to be drawn to dad that can easily go wrong with a relationship that is to close and wife like mama...I'm talkin about as early as 4 to 5 yrs old. Be wise and careful.
Girls pattern/copy after mama well.
Now boys slow as hell.
If they don't make them any difference who gets them to the pottie and the wee wee out if they can't. LOL They just "GOT TO USE IT! cute
til they start pissing on themselves everywhere.
Alway good to have a father or male image/role model around to pottie train a boy(s).
It does speed their developement up with in this area bathing.
Believe it or not boys will watch fathers pass the age of 20 if still in the househole as a role model of self care....shaving, haircuts, neatness from finger nails to toe nails (important too).
So, I'm going to stop here by sayin children need to see as much a & many things as they can see in their proper & relavant percepection of males/females methods of being alike as well as unalike.
And don't fool yourself.
If you around your wife or lady when PG would you believe that unborn child knows father's voice waves from mothers. It is absolutley remarkable.
Think about it, even the lowest forms of amimals & insect world has the abilitiy.
Balance what and how you teach your child and what you expose them to.
Their tiny little brains come here pre-wired. It's up to you to guide it into the proper channels.

It can very well be why so many young individuals are confused from having simple manners to serious issues with sexual ID.
Experiments have been conducted & proven that you can raise a baby kitten and bady dog puppy together.
If you train that kitten to the litter box and the puppy observes and you don't train the puppy to news paper or sratch the door for out side...
that puppy will go to the litter box just as that cat.
I know cause I did it with my pets.
So you get some of my pts here.
Good LUCK DADDY!
Follow your heart for traning.
Remember this that always has got me thru with my children:
My motto: "Let not the young be misled, for common sense is not so common if not said..."
(wink)