That's one way to make you want to ride a bicycle.
Jess, with your experience as a lawyer. Could one be arrested for lewd conduct for riding that thing ?

Depends on HOW you ride it.
Of course anyone can be arrested for anything; the question is if they can be convicted.
The mannequin (or whatever the hell she is) could be turned around.... but that
also presents a problem.
The lesser offenses would be disorderly conduct, or creating a nuisance (crowd).