They typically want to know if a female is sexually active because a lot of women come in claiming “I can’t possibly be pregnant! He pulled out!” and such nonsense, so if they say yes to being sexually active, it’s an automatic pregnancy test especially before prescribing certain meds or tests.Sorry if this is dumb, but is it possible the not sexually active specifically refers to Amber not getting fucked by a dude? That in combination with the "Single (lesbian girlfriend)" makes me think the questions are tailored to straight sex, I assume for STI concerns.
(I'm not a fat lady lezzer in Kentucky at the ER, though, so I'm not sure if that would be a typical line of questioning)
As far as STD’s, obviously lesbians get them too, but it isn't necessarily tested for unless the patient presents with symptoms.