When we hug someone, it releases oxytocin, also known. as the cuddle hormone. Also, from a psychological perspective, hugs can make us happy, and fulfill us with the feel of devotion, love, and trust. Hugs are the perfect way we express our love or affection. It allows us to connect with our friends and family. Hugs could be great therapy for struggling with depression and loneliness. It can also reduce stress and make us feel more healthy. Hugs are powerful and effective way to comfort someone who feels sad.

This statement ”first of all” is grammatically correct, in other words, you can start your sentence with that statement. Particularly if you speak about many different things, so you would like to divide them. But you could also use some other synonyms such as: ” Firstly, before anything else, in the first place, to begin with, etc..