Why are older women so nice?

I’m 18 and a girl, almost 19 and I work in retail a lot. I’ve noticed that women who are older than me are very kind, (20s and up) they give me compliments, advice, have a positive attitude, make conversation. I feel like there’s a social barrier when talking to girls around my age, but with older men no, I feel comfortable and not awkward. It was also like this when I was in high school, they’re just really sweet. Anyone else have this experience?