Cat enjoying petting time | Any one knows why my cat salivates when she is petted ?

My cat is a strange every time I pet her or she is excited she salivates. She is a rescue I don't know more about her parents or life on the streets She was almost 1 month or less when I found her and was severe malnourished. Subscribe for More Videos : https://bit.ly/2VvI711 Thanks For Watching !!!