A spanko who enjoys spanking play with all genders. They may identify as straight or gay and have a preferred gender that they play with but also enjoy spanking other genders as well. Or, they could identify as bisexual or pansexual and enjoy spanking all genders.
Who you like to spank is not necessarily in accordance with who you are sexually attracted to. Some people like platonic spankings.
Person 1: Do you know if that female top plays with women? I heard she has a boyfriend and is a straight girl.
Person 2: Yeah! She's pan-spank-sual. I've seen her use the hairbrush on a naughty young lady before.