So I took a look at the Rosh, it does say what yitayningwut claims, that you can be Yotze P’ru U’rvu without Keddushin.
The Rosh continues though, to say that Birchas Arusin (Sheasar) is a Birchos HaSheveach, and not a Birchos HaMitzva, because getting married is NOT a mitzva.
So now we have proven that according to many Rishonim and Achronim in many cases, if not all, there is no mitzva to get married.
I always believed that the primary purpose of marriage is for building a bayis ne’eman.
Hate to be cynical, but which of the 613 is that? (there is an answer (I think), this is Socratic)