How can you tell if someone you meet is drug and disease free?
Unfortunately, it is impossible to tell about someone by just looking at them and even asking questions doesn't always bring honest answers. There are no 100% guarantees about this (or really anything else in life). We have found that by taking time after we meet someone and getting to know them we can have a pretty good idea of what kind of people they are and if they are "all that they ought to be" or not. A person can hide things about themselves, but generally not over a longer period of time. Also, it is important under any and all circumstances for you and your partner to use whatever level of protection you feel is necessary. If someone you meet isn't willing to use that protection - or even to discuss using it, they probably aren't someone you want to have anything to do with.
We are friends with quite a few couples at the club we go to and there is another couple that we would like to get to know. However, one of our friends has told us some very negative things about the other couple. Should we forget the new couple or go ahead and try to get to know them ourselves?
Unless you are fairly certain that the comments are totally accurate, it might be a good thing not to take someone else