It is the intention of the person using it that is good or evil, not the magic itself. Wiccans, through their worship of the Goddess and The Horned God do have a more balanced outlook on sex than other religions such as, say, the Christian church. The Christian teaching that the Son of God was born to a human woman but that no sexual contact took place has led to a fear and disgust of sex original sin and all that. Wiccans do not see sex between consenting adults as sinful, but as a natural thing. Provided it is practised safely, between consenting adults we consider it perfectly natural and acceptable.
Witchcraft is a cult.
A cult is defined as a group of people dictated to and blindly following a leader. The topmost point represents spirit. No, Wicca does not seek converts and Witches do not volunteer information about their beliefs. You should certainly be wary of anyone you meet who is keen for you to come and join their coven or group or gives away lots of information about their rites and activities. Many of us come from a long line of witches and the secrets are handed down.