Her intuitive powers seem to fail when it matters most: when it comes to a guy she finds physically attractive.
Three of the words in this sentence, “it,” “comes,” and “to” are clutter. After weeding and rearranging a couple words, the sentence looks like this:
Her intuitive powers seem to fail when it matters most: when she finds a guy physically attractive.
To prevent weedy writing, review your drafts carefully, delete any words that don’t serve a useful purpose, and move words around as needed.