hair elastic
a girl gives you her hair elastic after you kiss her. It's like she's saying 'you're not getting out of this easy.' And you're stuck with it forever.
He got the elastic from his crush and wore it like a bracelet for a week.
She gave him the elastic after they kissed and he texted her: 'I'm never getting that back.'
He got the elastic from the girl he asked to prom and now it's stuck in his sock drawer.