Switched

Buffy switches bodies with someone.  Before she can let anyone know what has happened, she sees the person in her body flirting with Giles.  Seeing this causes Buffy to realize that she has feelings for Giles.

Setting:  Season four or later.

Rating:  Any rating is fine.

Must have:  Giles realizing that Buffy has switched bodies with someone before anyone tells him

Optional:  Giles responds with his own flirting, thinking that he's flirting with Buffy, before he discovers the truth.

Optional:  Giles and Buffy share a kiss (or more) while she's still trapped in the other body.

It would be nice if Buffy & Giles get together in the end, but it's not a requirement.