the operative word is CONSENT. different societies factor in their own societal dynamics to arrive at an age when they think a girl can give consent to a man for a sexual dalliance. and, yes, it is arbitrary, since we all know that the age varies from country to country, and, in cases, from province to province. however, a man who cannot legally have sex with a 15 year old in his country, and travels to another in order to do same in another, in which he feels the laws are lax, is even worse, and needs to have serious corrective measures applied against him.