You can find chocolate flavoured and covered items almost everywhere these days, but when it comes to beer normally chocolate would be seen anywhere near it! However, this is Chocolate Stout from the Sankt Gallen Brewery based in Japan. With this, you can buy your girl chocolate and end up drinking a nice strong beer all at the same time, of course, the girl is not going to see it that way.
This is a translation covering the chocolate beer from the Sankt Gallen Brewery website;
You can also grass Chocolate not only pouring chocolate drink beer; eat together while drinking a glass of chocolate beer. In the original work by Mr. Masashi Yanagi pastry, is finished with handmade one-by-one selection of the cocoa-friendly beer. I am a chocolate thoroughly until lingering after scent through the nose when you smell drifting when the aroma and cocoa glass, the synergistic effect of the aroma of chocolate beer is excellent, poured beer, including the mouth and finished drinking.
Sets of this chocolate flavoured beer will start from around $25 (£17).
Source: Incredible Things