Some characters are or were in a romantic relationship.

Male characters are kicked in the groin, which disables them.

The idea of a possible romance between Po and Tigress is explored throughout the show for comedic purposes.

In one episode, Tigress falls in love with someone titled 'Midnight Stranger', and begins to act in an awkward, uncharacteristically love-struck manner. After discovering that the Midnight Stranger was Po, she was utterly horrified and has to leave to throw up.

Bad Po flirts with Tigress.

In one episode, Po looks for a girlfriend for his father.

Some kisses are shown.

Some episodes have romance as their main theme.

One episode features several close-ups of characters kissing on the mouth, which can be uncomfortable for younger viewers.

in one episode master chao is presumably killed by getting shot with arrows although there is no blood

Some episodes have dark stories, involving wars, genocide, sacrifice and forced labor.

Po stabs Shifu with a fake knife.