Tell me about Sag loyalty

Are you loyal? How loyal are you? What makes you loyal to someone? What makes you lose your loyalty? What would make you turn on an alliance? What makes you want to bond with someone? What would make you stab someone in the back?

I am not trying to troll or start an anti-Sag thread, my BFF and my mom are both Sags and they are the sweetest, kindest, most tolerant and loving people who will do anything for anyone. So, just so ya know, I love Sags and the fire and candor and fun and laughter and spirit.

What prompted me to ask this question is I've been watching Survivor. There is a male Sag (Tony) and a female Sag (Kass). Both have made alliances and turned on them.

Tony has an alliance, but has approached people in the other alliance and somehow convinced them to vote his way, only problem is he didn't tell the original alliance what he's been doing and now they think he is a liar and are feeling betrayed because of his omission.

Kass has promised to vote certain ways and she seems dead set on her decision, but then right before Tribal Council she gets another train of thought or a different focus and changes her mind and votes opposite what she said.

Just part of the game, but I thought it was interesting how they are playing very similarly. Not sure if it's really a loyalty thing since they really don't know these people, but maybe more of a "can't make up their mind" or a manipulation thing or a "keep 'em guessing" kind of strategy.

Any thoughts?

hard to tell from a game show