That's a more difficult question than you may realize, but the simple answer is "yes."
With computers, and even before, most attorneys start out with boilerplate language in a template that either the attorney sits down and writes; or the attorney gets it out of a book, from a class, or from another attorney. As times passes, and the attorney becomes more experienced, or the law changes, he or she will probably edit his or her boilerplate over the years. Often (especially in larger firms), a paralegal, legal assistant, or other non-attorney will take the basic information (name, address, etc) and plug it into the boilerplate, perhaps making some changes here and there, adding or subtracting paragraphs, etc.
(The same is true for virtually any other legal document an attorney prepares for you, from wills to trusts to contracts).
Some attorneys carefully read everything that their assistant has prepared. Regrettably, some attorneys don't - not everyone is a good, thorough attorney.
So, all that said, this is why it's so important to talk these things through, and have your own attorney review it (if a lot of money is involved, in particular) before signing.
Now, I always tell people to put terms in there about basic housekeeping, such as who will take out the trash, wash the dishes, have cleaning duties, and etc. Although I am half-joking when I suggest this to people, unless a couple has lived together for quite some time - long enough to know, for example, whether you have compatible standards for leaving or washing the dishes - working out these things ahead of time - just talking about them, at least - is a good, practical exercise.
Besides household chores, it's also important to decide how bills will be split (who pays for dinner? Will you have a joint account? Who pays the mortgage? Will there be limits on expenditures for clothes, furniture, vehicles, etc? Does your spouse pay bills on time or wait until he gets two late notices?
And - it's important to talk about sex and sexual expectations (but this is not usually written in a prenup - that doesn't mean it can't be - anything and everything can go into a prenup).
Does that help? I hope so! I'll check back a little later to see if you have any more questions. I'm happy to answer them!
If you're done, please remember to click on "accept" - otherwise I won't get paid anything at all!
My best, XXXXX XXXXX's hoping you'll have a happy marriage that will last 100 years,