Firstly... Where?!
And secondly, not surprised. A combination of higher tuition fees, harder to get jobs, more and more people talking about sex, people engaging in sex at a younger age, access to websites like AW, access to better technology that allows better tracking of people I.e. Uber and a few other things I'm sure have led to increased student sex workers.
It's a shitty situation but, and its very hypocritical of me I know, I enjoy a younger student punt than an older one.