The models have very svelte arms. What happens when a bigger person tries to share the bottom and had and arm taller than the top. Are you using the other per

The models have very svelte arms. What happens when a bigger person tries to share the bottom and had and arm taller than the top. Are you using the other person's arm as an armrest? Ew potential. Also, how long until some breaks their arm by getting it stuck in the hook?