Asking help from a doctor for your ED is different from answering a questionnaire for a study. The former could help you directly, the latter only indirectly (

Asking help from a doctor for your ED is different from answering a questionnaire for a study. The former could help you directly, the latter only indirectly (if at all) by maybe attracting attention to the problem from the medical community. But if you don't have ED you're not likely to either go to a doctor for a condition you don't have, nor participate in such studies.