People who value touch as a love style feel the most emotional closeness when they are touching and being touched. While it's easy to conflate the two, physical touch is not about eroticism or sex. It is about feeling recognized, affirmed, and valued through reminders in the form of touch. Holding hands, hugging, cuddling, kissing, or a back rub are all valuable to someone who needs physical touch.
These people are also more likely to be comfortable than average with public displays of affection (PDA). It is not that they are necessarily less shy or more exhibitionist than most, but rather because they value touch, they are willing to push past their comfort zone in order to share a moment of affection.
Because physical touch is an important source of intimacy for these people, they are often the least comfortable and most annoyed by unwanted touching.
Low scorers on physical touch do not necessarily feel emotional closeness through subtle touch. Moreover, it often takes them more time than most to become comfortable with someone to the point where they can feel true intimacy through touch. To those who score high on physical touch, low scorers might come across as cold or unloving, especially early on in a relationship.