Engineer John Hindmarsh developed a strategy to soften latex and now makes sex ... Engineer John Hindmarsh developed a strategy to now soften latex and makes intercourse devices to be used in clubs and porn films and materials dominatrixes and fashion developers with latex garments Making intercourse devices and kinky bondage gear alongside somewhat more mundane stuff like windscreen wipers is perhaps all per day's work with a bachelor that is unassuming Gloucestershire. Engineer John Hindmarsh, 58, developed a solution to soften latex and now makes major intercourse toys for usage in clubs and porn films and materials dominatrixes with.