Cast your vote
At the age of 18, U.S. citizens are granted the right to vote, provided they haven't been convicted of a felony. Also, at age 18, one can engage in consensual sex (you can engage in consensual sex at 16 or 17 in some states), go to the military and get married (you can even get married at a much younger age in some states). However, in most states, tobacco, alcohol, and firearm purchases (unless it's a rifle or shotgun) are illegal unless a person is 21. In most circumstances, a person can't enter into a legally binding contract unless they are 18 years of age. Legal age, therefore, is arbitrary. The same person that falls within the guidelines for being a victim of child molestation can be charged as an adult for committing a crime.