Girls, what would be your motivation behind sharing chapstick with a guy?

Anonymous
I know this sounds like a weird question, because I have never seen it before. A couple of days ago I was at work and with this could weather my lips were killing me, so I mentioned "I need to get some chapstick" (they are readily available next door) and as I was walking out, this girl who I think is extremely cute told me "you can use mine". I haven't known her for that long, so its not like we are close or anything, I was like "sure" (like I said, she is cute, so its kind of an indirect kiss haha). Is this common practice? I've heard of people being nice, but usually these kind of products are not shared with everybody and I know that girls are kind of chapstick freaks and won't share it, could she be thinking about the "indirect kiss" theory or she is just a good Samaritan? lol.
Updates
+1 y
like I said she started a couple of months ago.She stares into my eyes when I talk to her, one time she batted her eyelashes at me. I haven't given any signals that I like her, I'm just myself, we do talk but just regular small talk and smile @ each other
Girls, what would be your motivation behind sharing chapstick with a guy?
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