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If you're having a hard time connecting to the opera, try comparing it to something you do understand. If you love fashion, for example, study the intricate costumes. Or if you're a Broadway fan, think about the similarities and differences of opera and musicals. Focusing on the elements you do understand can keep you from getting bored. Sometimes, sitting still for too long during an opera can make people feel restless. Don't stay in your seat during the intermission. Use it as an opportunity to stretch your legs, talk to your neighbor, or get a quick snack outside. Pay attention to how long the intermission lasts so you can get back to your seat by the next act. Opera is known for expressing powerful feelings through the dialogue and song. Immerse yourself in the emotional experience: laugh at the comedic parts, gasp during surprises, and cry when the characters face tragedy. Putting yourself in the characters' perspectives can make opera a fun and cathartic experience.  Operas are made to stand on their own as a form of expression without necessarily knowing the language. Don't worry too much about understanding the characters or the plot. You can still appreciate the music abstractly. If you tend to tear up when you feel strong emotions, you may want to bring some tissues just in case. Unlike musical theater, opera patrons often clap during the production. But there is still some structure as to whether the audience should clap—after a particularly moving aria or act is most acceptable. If you're not sure whether to clap, watch the audience and try to follow their lead. If you want to compliment a particular singer, shout bravo (male), brava (female), or bravi (gender neutral/plural).
Relate the opera to something that you enjoy. Take a break during the intermission. Let yourself run with the emotional intensity of opera. Wait until others clap before applauding.