Is it safe for my dog to penetrate me?

It is not safe or appropriate for a dog to engage in sexual behavior with a human. Such actions can pose health risks, including the transmission of zoonotic diseases, and can also lead to behavioral issues in the dog. It's important to maintain appropriate boundaries between pets and humans for both safety and ethical reasons. If you're facing any issues regarding your pet's behavior, consider consulting a veterinarian or a professional animal behaviorist.