It's a sales tactic, isn't it? I've always been complimented by them on my skin. Lucky me, I thought - until I read on here how many other people get the same. Then I googled, and found at least one make up company which suggests it as a sales tactic. Then I went make up shopping and had to fight back the giggles when the SA told me I have 'lovely skin' 
It's a tactic isn't it? What other ones are out there?