That question had asked which of the signs (of the ones they gave me to choose from: Gemini, Cancer, or Aries) would be most likely to cause a Sagittarian heartache. I chose Cancer primarily because it is the only sign that Sagittarius is not compatible with. (Fire signs, such as Sagittarius, are compatible with other fire signs [Aries and Leo], as well as air signs [Aquarius, Gemini, Libra].)

The Sagittarius-Cancer relationship will have many misunderstandings and therefore cause heartache for both signs.