This is something that would seem important for all participants, at least to me
I try (with varying success) to tease out if partners have any medical history or sexual health issues that need some care and attention (a good eye and diplomatic skills are important here). Checking in with your companion if an activity is ok with them to do, comfortable, working for them sexually is also desirable... and many people have fantasies and sexual preferences that they may be hesitant to admit to
Remembering to give plenty of vocal feedback (especially for someone like me, who is naturally quiet during the act) is also good, and don't forget the use of it in helping encourage your partner 'to arrive', which just seems like good manners And don't forget the 'after action report', as you lie there afterwards
What are other people's feelings and experiences on this?