Why did I test positive for cocaine when I've never touched the stuff?

My dad requires me to take weekly drug tests since he found out that I was smoking marijuana. My first test came back positive for marijuana and cocaine. I was not surprised about the marijuana because I had only been clean for five weeks, but I have never done cocaine. Is there anything that could have triggered a positive result? Could opium or mushrooms or any other drug possibly trigger this positive result?


Is my loved one doing cocaine?

1) I found a white powder in my friend's car and I think it might be cocaine. I'm not sure if it is or not. I don't know if I should confront him with it or what I should do. I don't want to see my friend get hurt, but if I'm wrong, I don't want to falsely accuse him of something like this. How should I go about handling the situation?

2) I am a first-year business student and have a little sister who is a junior. I think she is doing cocaine because I found some "paraphernalia" in her room last week. What can I do without damaging my relationship with her?


Do I need surgery if my foreskin doesn't fully retract when I'm erect?

I'm a 19-year-old uncircumcised male. There was a group discussion about sex in my dorm, and people were describing how erect, an uncircumcised and circumcised penis should look alike, that the foreskin should pull back all the way. I had never thought anything of this before, but looking it up on the internet found that I have what I believe to be a frenulum breve, in that my foreskin retracts (unlike phimosis) but not all they way. Unfortunately, all of the information about this (as well as surgery info) is from the UK. I have searched the web for hours and couldn't find any information about this condition in the US. I was just hoping you might shed some light on my condition, as well as on a procedure called frenuloplasty.