Durngrim is the rare exception to the rules... Here's what thed BoEF says bout our mountain friends.
Dwarf~Love is like stoneDwarves tend towards homospecies, heterosexuality and monogamy. They usually choose one dwarf of the oppoiste sex and bond for life. Marraige is respected by drawrven communities and held as a sacred vow. The community elders arrange most marriages. Love is an emotion dutifully cultivated within marriage. It does not come easily and requires much skill and shaping.
Despite their reputation as curmudgeons, dwarves are energetic lovers, known for their prolonged sexual sessions, which last for a full day or more. Srill dwarves are not very sexually adventurous, sticking with "tried and true" methods and shying away from many kinks that other races may enjoy. LIke everything else in the dwarven community, dwarves are taught the basics of sex in the same way that they would learn about how to handle a hammer and tongs at a forge- some things are done just so, as that is the way it's always been. Humans, elves, and gnomes are often amused that many dwarf communties provide their young dwarves who reach sexual maturity (typically around 40 years old), a "manual" of acceptable sexual positions, often written out in dry, clinical prose.
Homosexuality is rare in dwarven communities, but shows remarkable support by its members, who see it as a true bonding of kindred souls. It is accepted that male warriors may come to love their fellows, showing remarkable loyalty as brothers-in-arms. Lesbianism, however, is even more rare and is viewed with suspicion. In those communities where females greatly outnumber males (often due to wartime attrition), fermales sometimes pair up and form life-long partnerships.
On Pregancy and Childbirh (paraphrased): They tend to have long and painful pregnancies. The dwarven communities are very protective of expectant mothers, being cared for by the females. For some reason or another, they rarely produce half-breeds unless the other parent is a dragon, celestial, fiend or other being noted for their ability to produce crossbreeds. Multiple births are rare and how this is viewed depends on the clan. Some see it as a auspicious omen while others view the child with suspicion. Fraternal twins are almost unheard of.
EPSC: She's crazy, lazy and oh-so-lovable!

"The deific powers I emit will surely burn your retinas!!!"
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