I have a girl friend that has used crack. They have told me they only used it once out of curiosity. I want to believe what was told to me but am skeptical to the validity of what she has told me. She has not appeared to have tried it again, because I will not tolerate it. There is obliviously more to the story but is not necessarily needed for what I want to know.
If you could help me out with the following questions I would appreciate it. Thank you for your time and consideration.

1) Is erectile dysfunction a known side affect of crack cocaine?
2) What are the long term affects of a one time use of crack?
3) Are the indicators of repeated use of crack cocaine?
4) What is the side affects specifically with crack cocaine?