 Rock fashions have been seen as combining elements of different cultures and periods, as well as expressing divergent views on sexuality and gender, and rock music in general has been noted and criticised for facilitating greater sexual freedom.Rock has also been associated with various forms of drug use, including the amphetamines taken by mods in the early to mid-1960s, through the LSD, mescaline, hashish and other hallucinogenic drugs linked with psychedelic rock in the late 1960s and early 1970s; and sometimes to cannabis, cocaine and heroin, all of which have been eulogised in song.Rock has been credited with changing attitudes to race by opening up African-American culture to white audiences; but at the same time, rock has been accused of appropriating and exploiting that culture.