LDS institute teacher, Gilbert W. Scharffs, states that, "It is not always clear which wives of Joseph Smith included concubinal relationships…The LDS Church and most historians recognize that Joseph Smith was living with a few of his wives, but not most of them.
Source: The Truth About the God makers: A response to an inaccurate portrayal of The Church of Jesus Christ
of Latter day Saints
by Gilbert W. Scharffs
220, and 222.
In other words, he
was sleeping with multiple women going from house to house.
This was a nice set up, for most of his
wives and "concubines" already had a husband, or were teenage girls living with their parents.
would not have to deal with these women under his
own roof, nor would he
have to provide for them as they were already taken care of.