zesty straight

A heterosexual with non-normative sexual or romantic practices, like BDSM, consensual non-monogamy, or having threesomes; especially, a heterosexual who feels that non-normative sexual or romantic practices set them apart from the rest of the heterosexual community.

Hey, I see Julia showed up in a leather corset and spike heels. She looks great. Does she date girls?
No, only men, sorry. I know she comes to all the queer parties, but she's just a zesty straight.