That it is not uncommon for a woman to choose to become pregnant without discussing it with the man. Methods include poking holes in condoms with a needle, lying about being on birth control, and using sperm in a freshly discarded condom.
Many women will discuss this "option" with their girlfriends, and many times are encouraged to become pregnant that way.
Benefits to a woman for a successful pregnancy include coerced marriage, monthly child support payments, government assistance in a myriad of ways.
Problems for the man can include coerced marriage ... that easily leads to divorce and the fleecing of his income & assets, loss of his home, unwanted child support, stress, homelessness, even suicide.
Yes, more men should know about pregnancy, and the very real, risky consequences.