This can include penetration, but does not have to.

The episodes were frequent and included oral and anal penetration.

The question remained, therefore: Did the facts of this particular case require that the definition be developed so as to include anal penetration of a female?

Complications of peptic ulcer may include bleeding, perforation, penetration, or obstruction.

Despite the insults, or perhaps because of them, Sahara is portrayed as an enthusiastic participant in the sexual encounter, which includes fellatio and double penetration.

This includes penetration of the center or hurricane eye of the storm.

Affectionate behaviors do not include penetration or genital rubbing, but are still seen as a manner of sexual behavior.

Rape previously did not include penetration of the mouth.

The charges included sodomy, rape, oral copulation and digital penetration.

This was later defined by the courts to include only anal penetration and bestiality.