They say that people do not change and, though this saying is right in majority of cases, there are sweet exceptions that make this life more interesting, pleasant and exciting. Usually this skinny cutie is a rather submissive girl who wants her boyfriend to take the initiative and do the job so that she could get her orgasm and do nothing else but tonight she turns into a real succubus. She feels so excited that she needs to do something about her passion for her boyfriend otherwise she will explode. Luckily, her boyfriend is more than happy to exchange roles and let her play the leading part.
You haven't experienced this before, it's time to put yourself in the action