Sexual frustration describes the condition in which a human

Human

Humans are the only living species in the Homo genus...

 or animal is in a state of agitation, depression

Depression (mood)

Depression is a state of low mood and aversion to activity that can affect a person's thoughts, behaviour, feelings and physical well-being. Depressed people may feel sad, anxious, empty, hopeless, helpless, worthless, guilty, irritable, or restless...

, stress

Stress (medicine)

Stress is a term in psychology and biology, borrowed from physics and engineering and first used in the biological context in the 1930s, which has in more recent decades become commonly used in popular parlance...

, loneliness

Loneliness

Loneliness is an unpleasant feeling in which a person feels a strong sense of emptiness and solitude resulting from inadequate levels of social relationships. However, it is a subjective experience...

 or anxiety due to prolonged virginity

Virginity

Virginity refers to the state of a person who has never engaged in sexual intercourse. There are cultural and religious traditions which place special value and significance on this state, especially in the case of unmarried females, associated with notions of personal purity, honor and worth...

, sexual inactivity and/or sexual dissatisfaction that leads him or her to want more sex or better sex, or a state in which he or she is perpetually sexually aroused

Sexual arousal

Sexual arousal, or sexual excitement, is the arousal of sexual desire, during or in anticipation of sexual activity. Things that precipitate human sexual arousal are called erotic stimuli, or colloquially known as turn-ons. There are many potential stimuli, both physical or mental, which can cause...

. Most often it implies simply an uncomfortably low level of sexual activity, such as typifies sexual dysfunction

Sexual dysfunction

Sexual dysfunction or sexual malfunction refers to a difficulty experienced by an individual or a couple during any stage of a normal sexual activity, including desire, arousal or orgasm....

 or involuntary celibacy

Involuntary celibacy

Involuntary celibacy is the absence in human sexuality of intimate relationships or sexual intercourse for reasons other than voluntary celibacy, asexuality, antisexualism, or sexual abstinence...

. The term can also mean some arousing stimulation without orgasm

Orgasm

Orgasm is the peak of the plateau phase of the sexual response cycle, characterized by an intense sensation of pleasure...

that is causing frustration over lack of orgasm.