Mankind has freewill to do anything. Claim a Darwin award or discover electricity.
If what we do is not in harmony with nature then we will harm our body and mind. Nature’s design is perfect. Every organ carefully made, positioned and interrelated to all the systems within the body. The anus is not designed to be a sexual organ and homosexuality is not in harmony with nature. Nature is about creation and sex between male and female are at its core. The greatest act of creativity is to create life. To have integrity we must be in harmony with nature.