I've got two question. First i look very young for my age and in many conversations this is joked about how young i look. I generally take it with a lot of humor and the other people too but what are some fun answers to someone making fun of how young i look? and what if other guys go hard on it and try to make me look bad in front of girls?

Second what are some good openers in situations like a city festival? i usually go for a standard cold approach like i'd do on regular events but i'm looking for something funny for this specific type of situation.