Short answers, pulled from the story.
The legal definition of battery in England and Wales requires only an intentional, unlawful application of force to another person. It does not require injury, pain, or the use of a weapon to be considered a crime. This broad scope means that a deliberate push, a slap, or even a kiss without consent can be criminal.
The 14th of July 1984 marked a quiet turning point in English legal history when a court ruled that even the slightest touch could constitute a crime. This decision established that everyday social interactions on public transport were implicitly consensual, yet any deviation from that norm could be prosecuted as battery.
In Louisiana, the law explicitly includes the administration of poison or noxious substances as a form of battery. This expands the definition beyond physical striking to include chemical attacks, distinguishing it from states that focus solely on the manner of contact.
The 2nd of November 2015 brought a significant change to how domestic violence was prosecuted in England and Wales with the introduction of section 76 of the Serious Crime Act 2015. This legislation criminalized controlling or coercive behavior in intimate relationships and acknowledged that battery within a domestic context was often part of a larger pattern of abuse.
In the early 21st century, some jurisdictions began to classify the act of spitting at another person as a criminal offense, elevating it to aggravated battery in certain cases. Courts have ruled that directing bodily fluids at another person without permission constitutes a battery that violates the victim's bodily autonomy.