this post is fantastic help on my paper On the contrary, the World Happiness Database was launched in Rotterdam earlier this summer, and showed that having children actually lowers your happiness levels (they go back up again once the little darlings have left home). 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])