Although organ donation conflicts with self-interest, because donation is vital to the community, interventions to increase it are ethically justified.
AMA J Ethics. 2016;18(2):156-162. doi:
10.1001/journalofethics.2017.18.2.msoc1-1602.
In the same way that we learn about normal variations in blood pressure, we need to learn about “normal” variations in sexual interests and practices. We want to avoid clueless questions or unintentionally inflammatory statements.