I went to Women and Children's Hospital yesterday to take part in the Vogue study, which is taking vaginal swabs from 300 healthy women to look at how vaginal microbial ecology affects women's health. They're going to do DNA testing on the samples to investigate vaginal microbiome. (Sorry if this is way too much information.) Anyway, in addition getting the swabs done, I had to answer some questionnaires about my general health and sexual history.
Compensation: $20, for about an hour and a quarter's time commitment.