Re: good dating/ bad marriage
i guess once you have long bf/gf relationship, you are used to it and expect that to continue after marriage. affair is not a marriage so when we think both are same, then this happens.
unless both changes after marriage, more responsibilities, house, family, bills and keeping love life alive etc
i guess dating is like time off/ holidays that you enjoy with some one you prefer/like/love. Living life with someone is bit different if not entirely.
bf/gf do also make happy couples as they understand each other better.