As a lady (as oppose to fashionista) your underwear should be fit for purpose and co-prdinated with the colour of your outfit. So, no black knockers under white trousers brilliant white bras advertising themselves underneath slinky back tops. Nude colour are always a good option. Too much lace is not good, because it is hard for clothes to fit well over clumps of crispy froth. If white underwear goes grey or blue in the wash, throw it out!!!! Those lingerie whiteners never work!
Tights aren’t very sexy, but they are wonderfully functional and it’s nice to know that the more expensive, finer deniers are the least likely to snag and run. A lady with foresight will keep a spare pair of tights in her bag, and no lady will ever wear pop socks with skirts. Would you?