But if the person was 18, it is a crime unless the person believed the person was 16.
Under the statute, it is illegal to knowingly or intentionally engage in sexual intercourse or oral sexual contact with any person who is below the age of 18.
For example, if you are 21 years old and your partner is 17 years old, it is illegal for you to engage in sexual intercourse or oral sexual contact with your partner.
Under Illinois law, the age of consent for any type of sexual activity is, typically, 17 years.
This means anyone younger than 17 years of age cannot lawfully consent to any type of sex act involving sexual conduct.
A person who is caring for you or supervising you, like a teacher, youth worker or foster carer, can't have sex with you or sexually touch you or perform a sexual act in front of you, even if you agree, unless they are married to you.
However, it is not an offence if the person honestly believed you were 18 or older.
Depending on what you are doing and who you are doing it with, sexual activity with a person under 18 years-old is illegal.
A person under 18 years of age cannot consent to sexual activity if: What about persons under 16 years old?
Even though you may not be a teenager anymore, you once were a teenager and are able to recognize the difficulty that comes with that period in life.
Most teenagers experience intense emotions, rampant hormones, and according to recent scientific studies – a reduced ability to make reasonable decisions due to an underdeveloped brain.