A scientist is a person that applies the scientific method during their investigations and/or research. Although this isn't necessarily true. You can be a scientists and just sit on your ass all the time. You can be a scientist and apply what you think is the scientific method, but it turns out it isn't once you submit your data for peer-review.
A scientist is therefore a person who is labeled a scientist by society.
Scientists and virginity
It is not known why scientists are usually virgins but many suspect it has something to do with their total lack of social skills and bad body odour.