Lesbophilia
Lesbophilia is a strong fascination with or fetishization of lesbians and sex between women. It's common — especially, though not only, among heterosexual men — and ranges from simple attraction to woman-woman intimacy to a more fixed fetish for it. In its healthy form it's just an erotic interest; the thing to watch is where it tips into objectifying real queer women (prying questions, treating them as fantasy fodder). As a fantasy it fuels a lot of porn, threesome wishes, and roleplay. It's about the appeal of two women together rather than any single act.
The draw for many is the doubled femininity, the tenderness or heat imagined between women, and the fantasy of witnessing or joining it. For some women it also overlaps with genuine bi-curiosity and self-exploration.
As fantasy it powers porn, dirty talk, and threesome or 'unicorn' scenarios; as reality it may be a couple inviting a woman, or a person exploring same-sex attraction. Roleplay and shared viewing are common expressions.
Low physical risk; the real care is respect. Real lesbians aren't a fantasy service — don't pressure, interrogate, or objectify actual queer women, and keep any third-party play (like a threesome) genuinely consensual and considerate of everyone's boundaries.