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What about airplane getting hit by wife plots
He spends a lot of time in the demon realm, it's more likely for him to run into sex pollens and nasty entities who put weird curses on him while he's just a little guy trying to fix his king's kingdom.
He brings home precious plants and potions to keep safe for his king or for himself for emergencies. Oops, accidentally inhaled something weird from the secret stash while sorting through it and now he needs to be taken, that's the only way it works (who wrote this shit????????)
Mobie jun is out of question, Airplane will smell like demon for days and he cannot contact/bother him with this, not to mention that's purely marital activities which he cannot ask his king to engage in! That's his king and Airplane is but a lowly servant.
So.. Cucumber bro is the only safe bet. He has modern sensibilities. He won't kick up fuss about casual sex which is also not casual but life saving.
He flies to his bro's peak, half crazed and kicks down the door, startling him and his son's lesson. Oops. His dear son will have to practice on his own, sorry protagonist, Airplane needs touch and he needs it now.
Cucumber bro taps him on the head with his stupid fan which only makes him fall into his arms with fervor. Three privacy barriers, two noise cancelling tailsman and a verbal lashing later, Cucumber bro finally lets their mouths meet and the relief is heavenly.
Peak Lord Shang Qinghua passes out fucked out of his mind (and the poison) and Master Shen refuses to answer his door till later in afternoon next day because his place smells so strongly of sex.
Stupid hack writer falling victim to his own writing. Get fucked. He thinks with satisfaction.