"I've had friends but none of them substantially resembled you."
She shrugs. "You seem to have already signed up for bailing me out of hazardous situations. I think the rest is good."
"I really wish you could figure out that thing, though," she sighs. "I don't make a habit of telling my friends all the details you pick up. I know you've already got what you got, but that just means you'll definitely notice if anything changes."
The essential discovery is that, while there's no way to stop him from perceiving sexuality, he doesn't always have to interpret it. Actually doing so is a little like walking around with your eyes slightly unfocused all the time - difficult, kind of uncomfortable, easy to forget about and end up stopping by accident, but possible.
"Hmm. So you'd still notice if something changed but you wouldn't know what, unless you accidentally interpreted."
"This - entire thing. You're relying on it as a primary sense but it's invasive; you can avoid interpreting it but only so much and it takes all that attention."
"That's a kind of attention too. More outward-focused telepaths than me have to learn it." Pause. "Some of them find various forms of meditation helpful but I don't know if they're related enough to what you're doing."