Just trust your observations. Do a video chat and ask to see him nude so you can inspect the goods. Do online searches of his email, phone number, and do image searches for his face. What standard of living does he enjoy. How intelligent does he come across. Are his photos clean looking. Is his home clean? Is he always online hooking up or do you only see him on occasionally. Does his profile sound conscientious and health conscious, or does he come off as dirty and haphazard? Is his status blank? On visit ask to use the bathroom before sex and do a thorough check of his medicine cabinet. Go to his fridge for water and do a look through. To calm your fears gather as much information as possible. The more you know, the better you will feel.