Of or pertaining to sexual satisfaction obtained without a partner; masturbatory(adjective)
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Use "autoerotic" in a sentence
"Having no life, I’d done research the evening before, learned that the term autoerotic refers to any solitary sexual activity in which a prop, device, or apparatus is used to enhance sexual stimulation."
""Detective, are you familiar with the term autoerotic asphyxia?"
"It is believed Mr Nomura had engaged in what is known as autoerotic asphyxiation, a practice of deliberately restricting the flow of oxygen to the brain for sexual arousal."