The different hetero and homo modes of maleness are not, of course, biologically fixed. Blue Hustler offers softcore pornography aimed at a hetero male audience. After polarity reversal under ac conditions, the homo charge is converted to hetero space charge. The DMG interacts with lithium through a hetero atom. The colloquial shortening "hetero" is attested from 1933. The word can be informally shortened to "hetero".