"Oh my darling, you're very important to me too," Susan said, tapping his nose lightly with her finger. "I know you'd never drop me or Ern or anyone for your boyfriend."
"What if you don't though," she countered. "Sleeping with someone casually is great, but finding someone to love you and hold you tight when you're scared or irritated or have had a nightmare? That's amazing." She moved so she could look him in the eye. "Anyone who leaves you or doesn't feel the same will face my wrath dear boy, but you can't not do something just because an outcome might hurt you. If we all did that we'd never do anything! We'd just sit at home wrapped in cotton dying of thirst because the water might be poisoned and also of starvation because 'what if I slice my mouth open with the spoon' and that's no way to live at all."
Susan grinned victoriously. "Then you deserve to fucking have it."