"Animals dressing up to attract mates" a load of nonsense.
It is simply BOREDOM. Something different........something to excite you......something a bit out of the ordinary.......
You find your mate/ partner/ spouse.......whatever and at first, sex is exciting and you can't wait to "get at it." Then you know what she has as underwear and lingerie, because you have seen it so many times, you know how she will respond , because she has done the same thing so many times. Then of course she becomes pregnant........that's it for sex and her attentions are for the baby.
You then find a "lover".....but the same applies here after a time, although with the lover, you can experiment...cunilingus, anal, threesomes, whatever.
But why the UNIFORM? It is not the uniform itself, that drives you mad, but what she is wearing underneath.......what does a policewoman wear, a female doctor, a nurse, a barrister, an airline stewardess wearing down the aisle......what are they wearing underneath.
Yes, it all boils down to releaving the boredom and trying something new..........me?......Air hostesses and female barristers.