First dates carry out a crucial role in making real first impressions that encourage a person to move forward romantically with another person. Regardless of sortings and filters, there are significant chances for a person to dislike another person completely based on the outcome of the first date. In this modern dating scenario, people get to know each other virtually first and then move on to the personal meet because that's how the current generation works. But meeting each other in person inevitably has the same effect in any generation. A couple may decide whether they can go further or leave it then and there based on the comfort levels of the first date.
Strictly speaking, bragging forces any dating partner to feel uncomfortable, awkward, and weird. Consequently, if you are someone who unintentionally brags about a few things, you need to know some 'B's to not boast about, and similarly, if you are someone who keeps entertaining dating partners who boast, then you need to know these very 'B's as filters to turn down the person without thinking about going on a second date.
Gone are the days when beauty is all about perfect size, shape, structure, color, and genes. With the changing scenarios, the standards of beauty also tilted towards positivity where every body type is treated as unique beauty. But even after breathing into the 21st century, some people act so conservative and treat themselves as perfect beauty icons who keep boasting about their looks and how they make other people drool over them. It is fine to be a bit self-obsessed in terms of looking gorgeous in front of one's dating partners but it is surely not acceptable if a person demeans other people by judging looks and comparing one's beauty standards with others.
So if your dating partner keeps bragging about how one's beauty standards are superior to others including yours and devalue people based on their looks on a first date, you don't have to continue seeing that person because in the future that person may end up degrading you to the core or feel embarrassed if you don't meet that person's beauty standards.