Clinical Trials

I've recently discovered websites that list clinical trials that are looking for volunteers, and in those lists are some for healthy people that they need. Some for prostate studies, some for reproductive health. And they pay you for volunteering! Has anyone ever volunteered for something like this? Was wondering if it's exciting or tediuos and boring...

I have done some trails for testing of drugs and food additives it was not as fun as I had hoped for. They were basic and not much hands on medical work. I do see that many teaching hospitals hire practice patients however they do not allow for invasive testing which I am assuming would be the fun stuff. That would be my dream job get paid to have med students do rectal and genital exams.

Apparently, women are in luck: http://www.projectprepare.org/

I have done a number of clinical trials and such when I lived in Manhattan. Not volunteer things: we were paid. Nothing exciting, either. Brain scans during a drug over hours. Metabolism study which did require underwater weighing.