Why are bathrooms still segregated based on gender?

That’s a thing of the past.  Biden signed an executive order allowing men to legally enter women’s restrooms and locker rooms (and vice versa).   I knew voting for Biden would pay off! 

A fine question.

There is no evidence AT ALL that segregating them makes things safer and plenty of evidence that it adds construction costs - money that could be spent making EVERYBODY safer.  Think how much money could be spent on making skid resistant floors or proper clearance for doors (so that people don't crash into each other) if we didn't have to have two full sized bathrooms for new construction.

"Gut feel" is not evidence.  "Somebody got hurt once" is not useful evidence without statistics (after all, both men and women have been injured in single sex bathrooms, so clearly statistics of before and after the change in law or policy are far more germane than proof of "it happened once")

Most colleges know this (more and more new dorms have mostly unisex bathrooms, though they usually offer a few single-use bathrooms for the squeamish).  The US Navy knows this (modern naval ships are constructed with unisex bathrooms).

If we started hearing about more rapes or sexual abuse or accidents in dorms that have these new policies, maybe sexual segregationalists might have a point - but we haven't.

So they don't.

When I was a kid down south i worked at a gas station that had men, women and in the back was one marked black. Of course they didnt use that one anymore. I should of saved the sign. probably worth some money now? We have come a long way.What do you  suggest? men women and ____what?

Private residences of conservative have unisex bathrooms and they don’t have a melt down over that, but for some reason they have a freak out over restrooms in restaurants and other businesses. I can see some of your concerns IN THEORY, but in practice those cases are virtually non existent. If they ACTUALLY did happen with any frequency we would be hearing about it ALL THE TIME. Crickets. 

1.  Men’s and women’s biology are different as have been cultural differences.   Most women apparently see little need for urinals, and I know many women freak out about men leaving the toilet seat up.  (I think these women fail to realize, a man leaving the toilet seat down when peeing is probably worse for women)

2.  Long held social ideals about the division of sexes.  The Romans had their orgies but still had sex specific public restrooms.  

3.  Many women are very uncomfortable sharing facilities with men.  Heck, some women want women only gyms.  

4.  Given MeToo, more men are uncomfortable with sharing their restrooms or locker rooms with women, fearing it makes them more prone to false allegations of sexual harassment.  

Not sure. Women urinate on mens privacy to begin with by wandering in to the mens bathrooms all the time (apparently they want respect from us) so it must be becasue of the hypocrite, we want 'equality' women who dont like the idea of being treat the way they treat men.

because use men dont want to see your condom floating around the toilet .

Bathrooms are segregated based on sex, not gender. Bathrooms were NEVER segregated based on gender. 

One of the many falsehoods the supreme court has made is falsely claiming that bathrooms are segregated by gender when ruling in favor of transgenders. That ruling is factually speaking pointless since the law segregates bathrooms based on sex, not gender. Ruling that you can't segregate bathrooms based on gender when the law says no such thing does nothing and changes nothing. 

Feminists think men would do something bad to women if bathrooms were unisex.

(Even though unisex bathrooms do exist and nothing bad ever happens in them.)

In some places they're not. They're called unisex bathrooms.