Sexual repression is a state in which a person is prevented from expressing their own sexuality. Sexual repression is often linked with feelings of guilt or shame, being associated with sexual impulses. What constitutes sexual repression is subjective and can vary greatly between cultures and moral systems. The ways in which individuals and groups undertake sexual repression can also be diverse in practice as either physical, mental, or both. This topic has been widely researched in varying fields as it is very broad in concept and execution. The history of this phenomenon is unique to societies with varying levels of sexual repression overtime. In modern times there are some countries still considered to exercise strong control over sexuality through legislation and societal pressures.