Is it normal to want to share flirtatious moments with a stranger

You are on a flight sitting next to a cute woman and you can't resist the lure of letting your arm lightly touch hers. Sudden turbulence makes for a reasonable excuse for why your touch becomes more pronounced, while at the same time you hope it hasn't become too obvious. For a moment you hold your breath thinking you are busted. You have no idea who this woman is, but you think to yourself that if she really didn't like the gentle brushes on her sleeve she would have already shifted slightly away from you. But no, she seems content to keep the contact with you. Even though you are barely touching shoulders, you can still feel her breathing in and out and you slow your own breathing until you both breath in perfect time. You hope she doesn't notice the flush on your cheeks. Perhaps you should pretend to be asleep. Is this normal or creepy?