"Not getting written permission from your date's mother and the unilateral approval of internet critics before having sex"

No no no wedrifid, the date's mother is clearly not objective.

You need to approach a local sociology or woman's studies professor, for preliminary consultation. After that schedule an appointment with your lawyer to set up a proper contract (since an informal written agreement wouldn't stand up to later scrutiny if parties are dissatisfied with the outcomes) that is then reviewed, supplemented by hearings of all involved, by an ethics committee that includes legal experts, psychologists, doctors, philosophers and social workers.