What about nipple sensation and the ability to breast feed?
Mastopexy consisting only of skin removal is extremely unlikely to diminish nipple sensation. More invasive procedures that internally lift the breast or combine augmentation with mastopexy have a greater chance of adversely affecting nipple sensation. Sometimes nipples become unpleasantly hypersensitive after surgery. This particular condition is a benign process that eventually resolves.
The ability to breast-feed normally after a breast lift is similar to the sensation issue: more invasive procedures that involve dividing the breast tissue are more likely to impair function. This particular issue is not a common concern because most women do not seek mastopexy until after their last pregnancy.