1 in 5 American women has children by multiple men.

One in five mothers have children from multiple fathers. The same ratio as Americans with college degrees.

If you have children by different men, do you suppose all those men are invested (time) with their children?

Of course not.

Is it a problem?

Of course it is.

One that cannot be solved however good the teacher is.

"This type of family structure was, however, more common among minority women, with 59 per cent of African-American mothers, 35 per cent of Hispanic and 22 per cent of white mothers reporting children with more than one father."