Twinned helmets (Patreon)

Someone wearing this black helmet comes up to you on the street one  night, "Hey, do me a favour, put this helmet on" she asks you,  gesturing with a similar golden helmet under her arm.

Rightly suspicious, you ask why in the hell you should do that.
She gestures at her ear like she's got trouble hearing, so you shout. And then try writing your question on paper for her.
She responds with the most devastating counterargument mankind can imagine, "Why not?"
Well  she's got you there. You take the golden helmet over your head, to  which it quickly responds by tightening its neckpiece against your  throat such that you can't remove it. You're starting to ask what the  hell is going on when a protrusion fills your mouth and prevents you  from asking or saying anything intelligible. The glass dome over your  head fades to black, robbing you of vision, and the last thing you see  is the lady removing her own dark helmet.
"Jeeeeeeeez, I needed that! Good to be free again I tell you, was in there for WEEKS!"
You  feel her pressing the other helmet into your arms, and you're reluctant  to take it. Though your vision is blocked, your helmet's internal  screen highlights the location of the other one.
"If you want to get that helmet off you'll have to convince someone to put on the other one"
Ah, that makes sense. You take the other helmet into your grasp.
"Thanks for putting that on for me! See you later, or never!"
Well...  how exactly are you going to go about convincing someone to put on this  suspicious helmet? Especially when you apparently aren't going to be  able to talk...