Call me weird, but I never saw Willow and Tara together as much two lesbians as I saw Willow fall in love with a gentle, kind, sensitive person. Gender never entered into it. Willow said it herself whan Kennedy asked her when she first knew that she liked girls. "It wasn't girls. It was ONE GIRL. Tara." That, to me, was why I never saw Willow/Kennedy as anything but Willow being confused, lonely, and vulnerable. To me, about the only difference between Kennedy and Parker is that at least Parker didn't drag anything out with Buffy. Willow and Kennedy would have been a great one night stand, with Willow waking up the next morning and realizing that, even with the tongue stud, there just wasn't any sort of spark between her and Kennedy.