We just had sex, he paid, and then he left. 'Actually, I was a bit scared, but I knew this was the only way I could get money. We skipped the dinner part and went straight to the guest house for sex,' Sze recalled. 'My first customer was an ordinary man in his 40s. But Sze, now 19, wants young girls to hear her story so they never make the same mistake. Her father doesn't know what she did as a 16-year-old, and she hopes he never finds out. HONG KONG, China (CNN) - She doesn't want to be identified, except by her nickname 'Sze,' and she has a secret past.