This is what I have been researching too as I want everyone to be safe. I can not find any evidence.
I know women who don’t want to use women’s are more likely to want mixed sex toilets. They hate the smell, the dirt and get scared in men’s toilet and the ‘gender neutral’ designs too interestingly enough. So have a female response. I know men who don’t want to use men’s want to use the women’s.
No one likes the men’s, if you ask any man he will probably say there are toilets he’s been in that he was a little bit worried about being in, that’s they are disgusting etc. My husband has been in football ground toilets and a pub where he got out quick.
Men who are happy being men have mixed views about ‘gender neutral’ toilets depending on design and sound resistance, but tend to be the default users as women exclude. The privacy means they are useful for ‘long sit downs’.
I also know it was argued in parliament it was discriminatory towards men to have a separate clause in the Sexual Offences Act specifically about toilets.
When I was at school, the naughty boys were put inbetween the good girls to try and dilute their behaviour. It was unfair on the girls.
The differences with behaviour in toilets is sexed and ramped up thousands of times. Mixed sexed toilets don’t work as you are creating very private cubicles in mixed sexed areas.