Sexist memes at work's group

I'm an amateur software developer working in an IT company. Only two women are working in this company and the rest male people. Sometimes I feel excluded because I don't speak the same language, also because I'm not as tech-proficient as my colleagues are.
In the WhatsApp group of the company, they send images, memes and for fun that makes me feel uncomfortable. Stupid sexist jokes, and even one time they sent a vintage porn scene. Usually, I just don't speak to them and don't reply in the WhatsApp group.

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