In an effort to challenge gender norms, 61-year-old Mark has worn skirts and heels for four years. With his work outfits, this robotics engineer manager from Germany gained more than 73k followers on social media.

Mark wants to demonstrate that cisgender, straight men can be “masculine” while wearing clothes and shoes that are traditionally considered feminine. He wrote on his Instagram page: “I am just a straight, happily married guy that loves Porsches, beautiful women, and incorporating high heels and skirts into my daily wardrobe.”

According to the father of three, his outfits are not indicative of his sexuality, but rather a way to be comfortable and fashion-forward while challenging gender stereotypes.