To be honest I think it's completely rubbish. Only a few days ago I was out in a disco with some lids and tried it out: went up to a handsome young woman with a strong set of teeth and knees you could balance a timing belt on, if you know warra mean (know warra mean lad!). Anyway, I did everything right, walking up slowly - my phone held high in the air displaying a topless picture of myself holding a puppy, which was holding a Lonely Planet guide to India in one paw and a bulge pic in the other paw - and performed the common ritual, gently placing my fingers to the downy hair on her cheekbone and then right-swiping as hard as I possibly could, screaming "TIMBER!" as she fell to the floor.
Nothing. I mean, she was quite still for a little bit and I assumed this meant she had consented to full petting, but when she stirred she acted as if it was 1952 or something. Then her mates and some other people starting left-swiping me really hard in the face area and the penis area. Joke.