Why is Venom a 15?

Why is it that the film 'Venom' received a rating of 15 in some regions? What specific content or themes within the movie warranted such a classification? Was it due to violence, language, sexual content, or a combination of these factors? Could the rating have been influenced by the nature of the protagonist, the symbiote Venom, and its potential for graphic depictions? Furthermore, how does this rating compare to similar superhero or action films, and does it reflect the changing landscape of content regulation in the film industry?