i'm just looking for an excuse to touch you.

This is how I like to imagine this conversation went.
Boy: "Do you need me to put sunscreen on your back?"
Girl: "Oh yes, that would be nice. It's a spray, so you can just spray it on."
*boy begins to apply sunscreen*
Girl: "Orrrr, you could awkwardly rub my no rub sunscreen. No big deal."