I´m pretty sure I will regret it, but since you appear so sincerely interested in learning about my personal take on sexuality, I will humour you.
For me, sexuality is a form of communication. Just like with all other forms of communication, people (hopefully in mutual consent) choose it for various purposes and also may intentionally limit the available purposes - which also leads to different degrees of intensity in the communication, depending on the needs of the persons involved.
So some people use a phone or email for having a verbal communication, even though this can be said to - as you like to phrase it - "put an impersonal barrier on a personal interaction" (compared to a face to face conversation), some people will agree to a priori exclude certain topics, and between certain people a conversation that exceeds the exchange of small talk is perceived as intrusive. IOW there´s a wide variety of options how, what about and in which intensity people choose to communicate.
Same with sex: Mere recreational purposes (we might call that "sexual small talk"
); even anonymity as a means to prevent getting too personal; au contraire: sex as an attempt to get to know each other better; sex as an attempt to create bonding; sex as the attempt to create or intensify a mutual dependency; sex as the demonstration of mutual committment; sex as the means to procreate. This list is not comprehensive. There can be more than one purpose, there can be various degrees to each purpose.
IOW the way people shape their communication is entirely depending on their needs and the nature of their relationship.
In my understanding, two people who are communicating (sexually or otherwise) are well adviced to make sure that their individual purposes aren´t too far apart. Otherwise they set themselves up for unpleasant surprises, misunderstandings, disappointments etc.
Hope that helps.