As Graham says, its a basic human instinct to look at and find people attractive or not, as a normal part of human life (for most of us) why would that not be part of a public open, off-topic chat forum? It’s done in a restrained way, it’s open to both sexes equally (though naturally is dominated by the men who are in the majority, but no-one complains about people putting female friendly content). It may be objectification to some degree, but that is entirely normal and there is nothing wrong with appreciating someone for their form when you know nothing more about them. I can’t think of anyone (without a major chip on their shoulder) who wouldnt want to be considered attractive by strangers. Sometimes it goes too far, but thats why threads involving rear entrance gates are generally frowned on and removed – theres no need to be crude.
Part of the whole human condition is to assess things on first impressions and then refine those impressions with further knowledge, appearance is the first impression in most cases, THEN you find out more about them. What you’re effectively saying is you cant find anyone attractive (or comment on it) until you know them personally. That’s going to be tricky.