No Mask?

I went into a store today. There were no posted "masks required" signs and the CDC says I don't have to wear one anymore as a fully vaccinated person but I still put one on. Why?  I didn't want anyone to mistake me, an unmasked person, for an anti-masker. I guess I kind of got used to how "easy" it was to tell who was on my side (pro-science) at a glance. I know that separating everyone into "us" and "them" based mask wearing is not great, nor is wanting to make sure no one thinks I'm "one of them." I figured owning up to it in writing might help me get over it.