An implicit attitude is one where an individual's feelings or opinions on some matter exist without conscious awareness. In everyday life we all have these attitudes; we may love blueberries yet hate strawberries, or we may be attracted to some types of people, yet be repulsed by others. These attitudes simply exist and we rarely if ever question why. These attitudes are shaped by many factors, some internal and some external. If a person grows up in a household or society where prejudices against other ethnic or religious groups are commonplace, that person is very likely to never question the attitudes that they absorbed while growing up.
Attitudes about foods, activities, personal attractions, etc. are partially shaped by a person's environment, partly by intangibles that are possibly genetic in origin (sense of taste, physical talents) and /or experiences while growing (personal attractiveness, personality types, etc.).