Public display of affection

In most of the Western world, such as Europe, Australia, New Zealand, Canada and the United States, it is very common to see people holding hands, hugging and sometimes kissing in public. It is not usually socially acceptable to be overly explicit, such as engaging in sexual activities. Kissing is more commonly seen in adult night-life, such as nightclubs.

Question: is it illegal to kiss in public uk
Answer: no