The
bigger stronger person rides in the front to control the bicycle. The
smaller person gets put in the back, so they never get to see anything but the
back of the front guy.
Here’s
a better setup. Put the front person recumbent. The bigger person
can ride in the back and see over the smaller person in the front, and the
front person gets to see everything!
A
little hard to make out the configuration from the photos I took in the
park. This picture I snagged from the web might show it a little better.