10 years ago, there was a lot of traveling hippies on CS. We (4 guys) had an appartement in the city center of a touristic town and we did have some female visitors that quite openly talked about how they like the concept of free love and sampling for biological compatibility before committing to a relationship. That said, I don't think any of us ever took any of them up on the offer. That openness tends to come with certain hygiene and style choices.