why are cancers vengeful?

I know geminis when they get angry or hurt(yes they too have feelings) they definitely take some kind of vengeance. Cancers why are some of our first reaction to take vengeance,and boooooy i talked to some and they say they follow thru.

Have never noticed anything like that but I'd say the reason would be because they were so hurt and tend to hold on to grudges. Oh! Yes I can think of something... Well atleast I think my ex crab wanted to get back at me by dating my friend. He seemed nice with me and I was the one who convinced my friend to date him... big mistake cuz later I caught on to it and warned her but she didn't listen and ended up pretty hurt. I really didn't care and although it caused some problems between me and my friend, it was nothing that made me lose any sleep.

Later he introduced me to a friend who didn't seem to know that we had dated (lived in a city far away) but I was sure I had talked to him before so I smelled something fishy there lol Of course I still let him take me out and gave him a hard time lol Oh I'm sure he regretted playing along with it big time 😄 (cuz I knew there had to be motive behind it but figured it'd be fun 🙂) Anyway, in the end he admitted to still having feeligs for me and disappeared, literally. Not before letting EVERYONE know that I had 'cheated' on him but I denied it in disgust and anyone who had asked me would just nod their head thinking he was a liar. But I also apologized to him so it was 'aight.