Hi,
My dear friend DB Lady gave you an excellent answer, as she always does (gave her 2 thumbs up).  Yes, most people are so much in love that they don't think of it.  The smart one do think of several things:
1.  Will he / she be faithfull.
2.  will he / she be a good parent.
3.  Do I really want to live with him
     / her for the rest of my life ?
4.  Will he / she love me when I am 64 ?
5.  Can we solve problems that will
     come across our road ?
6.  If we'll have to split will if be
     friendly or ugly ?
Best regards,