public static String YesOrNoValidator(String message) {
		System.out.print(message);
		String answer = scanner.nextLine();
		if (firstTime) {
			answer = scanner.nextLine();
			firstTime = false;
		}
		while (!(answer.equalsIgnoreCase("yes") || answer.equalsIgnoreCase("no"))) {
			System.out.println("Wrong input. Please answer with 'yes' or 'no'.");
			System.out.print(message);
			answer = scanner.nextLine();
		}
		return answer;
	}