1. Notwithstanding any other provision of law, any adult person may adopt any other adult person who is at least 10 years younger than the potential adopting person, except the spouse of the adopting person, by an agreement of adoption approved by an order of adoption of the district court in the county in which either the person adopting or the person adopted resides.
2. The agreement of adoption shall be in writing and shall be executed by the person adopting and the person to be adopted, and shall set forth that the parties agree to assume toward each other the legal relation of parent and child, and to have all of the rights and be subject to all of the duties and responsibilities of that relation.
3. Notwithstanding any other provision of law, the petitioner being adopted may change his or her name as part of the adoption petition, if so desired.