That’s why we want it. Impossible gadgets are always the most valuable. — Charles Sheffield

The prevailing theory to resolve this paradox comes from limited studies of Lo’tfian physiology. The male brain, it is believed, is highly organized and possesses powerful intelligence. However, it contains an unknown physical inhibitor, chemical in nature, that forbids the employment of that intelligence when in the presence of a Lo’tfian female. Confronted by such a female, the reasoning ability of the male Lo’tfian simply switches off. (A much weaker form of this phenomenon has been attributed to other species. See Human entry of this catalogue.) —From the Universal Species Catalog (Subclass: Sapients)

Don’t confuse caution with cowardice.

Human culture is built around four basic elements: sexual relationships, territorial rights, individual intellectual dominance, and desire for group acceptance. The H’Sirin model using just these four traits as independent variables enables accurate prediction of human behavior patterns. On the basis of this, human culture is judged to be of Level Two, with few prospects for advancement to a higher level. —From the Universal Species Catalog (Subclass: Sapients)