I have no problem with Republicans trying to make clear that they're no enemy of people who merely wish to be lift alone to interact with other, fully-consenting, adults.
What is a "fully-consenting" adult? What can they "consent" to? What role does or should the State have in defining the family and defending it?
A fully-consenting adult is an adult who is legally capable of giving consent (e.g. not adjudicated incompetant, etc.), and who does so absent any form of unlawful coersion.
As for the state defining or defending the family, I prefer to have the state stay out of that business as much as possible. Society's institutions (families, churches, the Boy Scouts of America, etc.) don't need much help from government to protect themselves; the biggest threat to them is that a government which protects them must thereby gain power over them, and a government which has power over them can use that power to destroy them.