I really like to eat jam straight from the jar.
Why would you eat jam right out of the jar?
Whenever I feel sad, eating something sweet makes me feel better.
It is understandable to want something sweet from time to time, but it is unhygienic to reuse the same spoon when you are eating out of a communal jar. If it is a jar you share with other people, then just scoop some out and eat from a bowl, not from the jar.
I don't care, I can eat from whatever vessel I want.
The people who want to eat the jam too would care about contamination. How about having your own separate jar and just fill it up so you can still have your comfort in eating from a jar that's wholly yours?