Because the baby develops inside her womb (below the stomach) and the skin stretches to compensate for the growth of the baby.
This depends on how much sex/upkeep a woman has (exercise of the PC muscle can tighten). A common misconception is that women need length to feel pleasure. The girth of the penis is what matters when...
If they don't, then 3/4 of my email is lying! Some prefer small and gentle. Most though like them bigger.
Most women who are eight weeks pregnant show only slight, if any, evidence of their pregnancy through a change in the size of their lower abdomen.
Sure it happens. of course pregnancy itself piles on weight.