The Cancer sign is closely associated with the moon, water, and emotions - I've found that i am very sensitive to the emotions of other people and the mood, call it a "spider-sense" or a "crab-sense" (get it?).
According to the author of "The 7 Fundamental Cancer Traits and What They Mean for You" written by Hannah Muniz, “they're primarily known for being emotional, nurturing, and highly intuitive, as well as sensitive and at times insecure.” Well that checks out.
Muniz describes that oftentimes, “cancers wear their hearts on their sleeves” but have a range of emotions swirling around on the inside which can make them seem sentimental or moody.
Just like the crab, Cancers will retreat into their shells and are more comfortable at home surrounded by loved ones. They prefer making intimate connections with a few people rather than socializing in large groups - which in my case I feel suffocated when I’m surrounded by so many people, I can’t breathe. Sometimes to get a breath of fresh air, I will isolate myself from others (including my friends - by the way, I make friends for life) and the crowd.