its hard to tell if it was a test but if that's what they were doing you passed. I would let her know what her best friend was trying to do just in case it wasn't a test. It also could be that he likes her and wants you to stay away from her because he wants her.
Who knows hope this helps
I have talked to my ex boyfriend that I was with for 2 years and he said I never had a smell with him before or after sex and I never noticed. I am now with a new guy we don't use condoms and when we first started having sex I didn't have a fishy smell until he went away for a week. I have been...