Hypnovisors are sold by Alex Rynard in his quest line
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I am honestly slightly unsure what is meant by this, but if you are implying you have to be fucked by Alex, you actually don't. Full on sex is only in like one or two scenes at the end of his story, and you only have to complete the first trust exercise with him to be able to purchase the hypnovisor. You can easily skip through the dialog if you don't like men.