Many times you want to link from your web page to an external source or related page, but you have multiple such sources or related pages connected to the same word or phrase.
Optimally this might be built into the needed protocols, but currently, it can be accomplished using JavaScript. When clicking you will get a small popup menu with all the links and their separate anchor texts and you can choose which one to follow. These are actual multiple hypertext tags, just hidden until you click on the visible one. This will enable search engines also to crawl all linked URLs.