One thing that was a turnoff when I did though was a Ts judgment about open relationships and friends with benefits. He seemed to think that those are signs that a relationship is not healthy and people don't want to take responsibility - IMO, it is often the complete opposite when there is mutual respect, agreement and good management of safety in such relationships. Someone the T did not seem to understand that sex for the sake of sex can actually be very healthy and enhance a relationship where the main focus and drive is not really romantic, given that it is consensual and everyone involved benefits from it.