unsolicited flirting

Rin
This old muscle guy came in to the gas station I work at this morning and I rang him out: he was talking to me and this other girl, and it was one of the weirdest and creepiest interactions I've ever had in my life.
Man: "oh I bet you guys are a fun group to work with," 
Coworker:"yeah we get along." 
Man: "why don't you smile more?" Me:"I am smiling?" 
Man: "you weren't yesterday." 
Me: "that was my first day, I was probably overwhelmed."
Man: "ah I see. Well, I think I'd have a lot of fun working with you girls; you're all about the size I like, especially you, I like you the most, you're quiet." 
Me:"ha... haha..." *gives change*
Man: *grabs hand* "soft too, okay, bye." *leaves*
Like, I don't mind if old men flirt with me or are playful at work, but for goodness sake don't make me feel like you're gonna come back and kidnap me to peel off my skin.