Each member of the sorority has to make their own bed.

Sounds like a little Freudian tounge in cheek here.

make their own bed should be make her own bed. Unless boys are now allowed in sororities, in this topsy-turvy world.

While it may seem like a Freudian tongue-in-cheek statement, the phrase "make their own bed" is actually a commonly used expression that refers to taking responsibility for one's own actions or situation. In the specific context of a sorority, it means that each member is expected to take care of her own bed by making it neat and tidy.

To get the meaning of this expression, you can break it down as follows:

1. "Make" means to prepare or arrange something. In this case, it means arranging the bedding and pillows on the bed to make it neat and presentable.
2. "Their own" indicates individual ownership or responsibility. It implies that each member is responsible for her own bed specifically.
3. "Bed" refers to the place where one sleeps, typically a mattress on a frame or base.

So, when someone says, "Each member of the sorority has to make their own bed," it simply means that each sorority member is responsible for keeping her own bed clean and orderly. It does not imply anything about the inclusion or exclusion of males in sororities.