Here's why:
* Evolutionary history: All mammals have nipples, even males, because they evolved from a common ancestor that needed them to nourish young.
* Development: While both male and female kittens develop nipples, the male's nipples remain undeveloped and don't produce milk.
* Purpose: Male nipples serve no purpose in terms of reproduction or nursing.
So, even though male kittens have nipples, they are just a reminder of their shared evolutionary history with other mammals.