Bonheur can be viewed as a "New Woman" of the 19th century; she was known for wearing men's clothing, but she attributed her choice of trousers to their practicality for working with animals (see Rational dress). In her romantic life, she was fairly openly a lesbian; she lived with her first partner, Nathalie Micas, for over 40 years until Micas' death, and later began a relationship with the American painter Anna Elizabeth Klumpke. At a time when lesbian sex – particularly tribadism – was regarded as animalistic and deranged by most French officials, Bonheur's outspokenness about her personal life was groundbreaking.