The Elder Scrolls V: Skyrim Tips

Ability to get Married
Obtaining and wearing the 'Amulet of Mara' will unlock new NPC speech options and also allow you to marry some NPC's.

The 'Amulet of Mara' can be obtained for 200 gold coins from Maramal. Marmal can be found in the Bee and Barb, an inn of Riften town, and later in a Riften's Temple Of Mara.

The 'Amulet of Mara' can also random spawn as dungeon loot. The chest at the beginning of the Bleak Falls Barrow has the ability to produce it.