A student gave strangers coupons for free hugs and started a hug chain
"No, I'm good... thank you."
It seems obvious when a hug is "sexualized" as opposed to just being about "connection." When it's about connection, it's a reciprocal thing, both parties win, but otherwise it can be a bit creepy. I don't think, "I think you are really pretty..." would be a good way to start.
I think it's a cool concept that they're continuously redeemable though. Great idea.