Don't doctors have an obligation to practice good medicine, though? (Good medicine defined as medicine informed by the relevant scientific findings). The medical view of homosexuality is that it is a normal variation of sexual orientation and that it doesn't require 'treatment'. Knowing whether a patient is lesbian or gay is relevant for doctors because lesbian and gay people have some different health risk factors than heterosexual people. For example, there is research that lesbian women smoke more than heterosexual women, and have different risks of various types of reproductive cancers (due to them being less likely to have children). Questions around these issues might be appropriate to ensure that health care is tailored to a lesbian patient. But slipping a lesbian patient photocopies of Buy-bull passages condemning sodomites to death is beyond the pale and utterly unprofessional.