This practice can be approached in a number of ways: watching to get aroused or to laugh, to repeat something or on the contrary to illustrate precisely which practices are not worth repeating.
To get aroused choose a genre of porn that you both like, without fetishes that your partner may not understand. Talk about what turns you on, what kind of porn you usually watch alone.
To spend the evening having fun, play the videos with funny names and follow the plot. Try to guess what the screenwriters have come up with this time. Acting, grotesque excuses to have sex, unexpected locations — it will make you laugh and cry at the same time. And you will by all means have a good time.
Show the videos with what you would like to try: pet play (animal roleplay), foot job (caressing with feet), penetration with a sex toy — anything that would be easier to show than explain. Or demonstrate what you don’t like, for example, aggressive friction during a fellatio — something that happens in almost every mainstream porn.
All the options can be combined, for example, you can watch videos to get aroused while noting the pieces you like or find unpleasant. Laugh from the plot of porn movies, and then act out a scene where it’s your turn to awkwardly try to “tempt” your partner to have sex.
Play, let your imagination go, enjoy yourselves! And don’t take what you see seriously. Porn is just a tool to help you have more fun together.
Enjoy the show!