Adult female elephants have two breasts, or mammary glands, located between their front legs. When a female becomes pregnant or is nursing her young, her mammary glands become more prominent.
I suppose it's interesting because we assume that most mammals have their mamary glands further down, like dogs or cats, not on the torso like humans do.
I think a lot of people base their assumptions on the way cows, goats, sheep and deer have their mammaries positioned between the waist and the rear legs.
(Waist? Seems wrong but midline is also confusing.)
Those also have hooves, and elephants don't, but it's the animals we're used to seeing nurse.