You know what makes me sad a little though is that in the rush to prove FUCK YOU MY PC ISN'T A STEREOTYPE I'M DOING THIS RIGHT!!! I have seen people slut shame on game and in discussions. This makes me super uncomfortable because I grew up being taught that "the gays" should just suppress their sexuality so as to not make people uncomfortable with its presence in front of them, and it was open season for anyone who dared display any tells. That kind of thing is STILL going on, especially against trans people. I have seen my son have to deal with that frequently, though usually not from his peers now that they are 16+ rather than middle school.
I think there is still a lot of disparagement and fear of sexuality on MUSHes, not as much as there seemed to be when I was younger/first starting out, but that could be just that I'm so used to seeing it, I think it's easier for me to sift it out now.
I think open sexuality in PCs is perfectly fine. I do not think it's something that should paint the player with a scarlet letter, no matter what the gender dynamics should be. If the attention is directed at someone who has said no thanks, of course that is way different. And of course, there might be IC ramifications (like a PC being booted from their job/organization/facing IC social sanctions) if they are ICly behaving inappropriately.
But to be honest, I don't see this very often. What I see more often is the whisper campaign or OOC slut shaming or derision. I get why it happens. But it still makes me feel pretty sad. It's a real thing, and I have seen it or had it happen on every game I've played (including Arx) no matter how the theme is set up. Sometimes I wonder if people are even really aware that they're even doing it. And I wonder if that's not a shock to some newer folks who maybe have not yet experienced the joy of pre-gamergate SHUT UP SLUT AND GET OUT OF OUR SPACE normalization of what female or gay or any community other than what a very specific subset of straight male fantasy are and aren't allow to be portrayed like.
I think it's a lot more subtle now, but sometimes I wonder generationally when this is encountered in a situation that I would just laugh off/brush off, if there is a reaction similar to my kids' horrified reactions to the haha-funny-rape-joke stuff in 60s-80s movies that I grew up with/loved (just about every romance movie, it's often a plot point that the best friend/brother of the male protagonist will try to "get his girl"), or seeing people just throw trash on the ground/in the ocean, or parents that are portrayed as normal loving parents slapping their children around (Parent Trap Hayley Mills version), or hahaha funny moments about how the girl can be tricked/intoxicated enough for the hero to fuck her even though she doesn't want him to at the time and then she'll fall in love with him. Rewatching my favorite movies that I loved growing up and that were shown (albeit editied for TV) on network television that I got to watch at friends' or relatives' houses with MY teenagers who are older than I was back when I first watched or liked them has been often surprising to me what they see that I never did, because I knew that's just "the way things were, what do you expect."