The school uniform question

Got up early and did a bit of writing this morning. I've decided to add in a flashback scene to when my main character (Beryl) was on her last day at school because it helps establish her relationship with her best friend.
But I'm not sure. I'm a bit uncomfortable about school uniform in a work of spanko fiction. My characters are over 18 and consenting adults, but... That said, where would porn be without the adult schoolgirl?

Wrong?

I hated what I had to wear at school, but now uniform makes me feel all tingly. And if that's odd then I'm a member of a very big minority, aren't I?  The "naughty schoolgirl" is now a fancy dress standard, so the uniform thing has resonance with lots of (presumably) well-adjusted adults.
Zille at Fetish Fantasies was talking school uniform yesterday and exploring some of the issues around authenticity. She says: "It’s just one of those weird things: I feel emotionally nakeder in the longer skirt, with big ol regulation knickers under that!)."
Is an adult in a near-real school uniform more of an affront to all things decent and true than one in a cartoonishly tarty, fancy dress shop one? Do grown up women in shirt and tie encourage wrongun's to view real schoolgirls in an inappropriate way?
Last thought, should I start out on Beryl's story long after she's left school and joined the adult world? Is it wrong to put the classroom into a work of spanko fiction (a school scene that will, of course, have to include a little corporal punishment - it is spanko fiction after all). Or should I just go for it?
PS Someone emailed me to draw my attention to this. The marvellous Poppy apparently had to where a uniform hat - a boater no less. Unbelieveable, and she says it was only 20 years ago!