The data bears out on how few inroads men have made into heavily female-dominated occupations.

CNN: Men, feel liberated to become secretaries

While mail sorters and carpenters are male-dominated, for example, office workers and sewing machine operators are female-dominated occupations.

FORBES: Jobs Outlook: Careers Headed For The Trash Pile

The main argument is that they tend to pay less than male-dominated occupations.

CNN: Men, feel liberated to become secretaries

Some female-dominated occupations such as librarians (82.1% in 1970 to 86.2% in 2011) and social workers (63.3% in 1970 to 81.6% in 2011) have become even more female-dominated.

CNN: Men, feel liberated to become secretaries

Of the top 10 occupations projected to grow in jobs in this decade, half are female-dominated.

CNN: Men, feel liberated to become secretaries