Yes, you need to wear underpants

Under the heading of, things I never thought I would have to debate: "yes, you need to put your underpants on before you put your pants on. Take those pants off, put on your underpants, then put your pants back on. Yes, you need the underpants first"

 Followed By:

"No, you need to put the underpants on before the pants. Putting on your pants, then shoving the underpants down them doesn't count as putting underpants on"