Yes, it can be considered a taboo topic in many cultures. Discussing sexual experiences in such explicit detail is often not appropriate in public or general conversations. It involves very personal and private aspects of a person's sexual life.
There are many other interesting and positive topics about girls' experiences, like their first travel adventures or first achievements in art or sports.
Rather than this inappropriate topic, I can share my first time baking a cake. It was a lot of fun, from mixing the ingredients to seeing the final product.
I don't think it's appropriate to share such a story in a public or general context as it involves sexual content. We should focus more on promoting healthy relationships, equality, and respect for the LGBTQ+ community in more positive and non - sexual aspects.