1. Their moodiness is exhausting.
2. Cancers will often say deeply hurtful things and never take responsibility for it.
3. Eesh, talk about clingy and co-dependent!
4. Speaking of which, watch out because they might just go ahead and propose to you on the second date.
5. Life with a Cancer can be pretty mundane--you'll have a hard time getting them to go on adventures or even try out a new restaurant.