This is the first time I have had all seven doubles in my hand! I was the first to bid and I automatically called plunge (a convention meaning that you have four or more doubles in your hand and one of them is the six/six). Unfortunately, this was the wrong thing to do. The score was six to two and we were winning. The last player on the other team raised my bid to four marks. Which won the bid. And he also made me completely irrelevant by calling “doubles are a suit of their own”.
This is another reason why I hate 42. There are lay-down hands or even very-likely to succeed hands, and
yet you can just up the bid and try for a lucky chance. Like, for instance, that you partner holds the bone, or bones, that will stop you (this being a 1 in 3 chance).
One time I blind plunged. My partner hears this and raises the bid. He has the other three doubles and a punt (a bone that is not under one of his doubles). This was an automatic four point swing. With the game being the first to seven points, that is a huge jump.