To quote Father Mike Schmitz, as Catholics “we are in the world, but not of it”. Inevitably, there will be times when the two will conflict with one another, and depending how traditionalist one is with their understanding of the faith, it could be particularly frequent. If it comes down to it, I choose my faith when the two conflict, but that’s a personal choice and it’s very understandable for various reasons as to why many people don’t. Especially in the Western world, the Christian faith has greatly influenced our culture. For example, think of the number of movies and TV shows about Christianity and that involve Christian themes (Lucifer (w/ Tom Ellis), The Passion of Christ, the Flanders in The Simpsons, etc) - there are so many ways which our faith has influenced our culture. Even in the more general and explicit ways, such as how massive Christmas is (although to say that society has distorted Christmas from its original purpose is an understatement). The other side of this is how our culture has infiltrated and affected our faith. This side is a bit harder to see first hand. But considering how Vatican 2 changed up how masses used to be in Latin, and were later changed to the vernacular language, the Church doesn’t oppose change (as some think it does - it opposes what is untrue). The SSPX, for example would argue that this wasn’t a great change, but I think a lot of Catholics prefer being able to understand what is being said without having to learn a whole new language. Also, this is perhaps more so a change based on wealth rather than culture, but for a long time the practice of abstinence from eating meat on Fridays was a widespread penance, but recently, the change was brought in that while this is still a good and valid form of penance on Fridays, other appropriate penances would be fine (Fridays during Lent should still feature a fast from meat, but other Fridays don’t have this necessary requirement). As for culture in Mass explicitly, I think a good rule to follow would be if you’re unsure hedge on the side of caution and reservation. But the entire purpose of the priest’s homily is to make us aware of how our faith can find a role within our culture. Admittedly, I’m not sure if there is a definitive Church teaching on this. But be mindful that the Church operates across the entire world and oversees approximately 1.2 billion Catholics, so it’s not easy to lay down in concrete one answer for all since there are so many cultures in the Church. Hopefully this helps, and apologies for not giving a shorter answer.