Only time I remember someone making a unique dialogue about our virginity is Kassyrra if you sex her on the tutorial, claiming that you lost your virginity to the succubus.
Speaking of Unique Dialogues, does anyone know some related to backgrounds? the ones I know so far that are ENABLED by certain dialogues are:
Hunter & Barbarian: You're actually able to tell where the edgelord Elf is hiding in Ryn's sidequest about the "mystery" of why he is so edgy, also you mention you're good at tracking when Cait's concerned of her father's whereabouts (and the Barbarian has a slight change in Arona's bathhhouse scene.)
Scholar, Noble & Arcanist: You're smart enough to help Kinu with her homework, also the Noble has unique dialogues about knowing who Phylander of Tychris was when Sigrune first mentions him & knowing Lusina's last name being of a noble branch.