What does it mean when a guy tells you to wear the forbidden pants?

He my ex but we sill talk and we be flirtin with each other, and today he hug me wanted to grab my butt but i didn't let him then later he texted saying that i should wear forbidden pants, like uh? he trying look at my butt? or grab it? or just makes jokes later?

What does it mean when a guy tells you to wear the forbidden pants?
Post Opinion