From the influence of the devil to overzealous restorers, there are numerous strange reasons and theories behind the conspicuous lack of pubic hair on women depicted in Western art.
Most statues were actually far more lifelike and often brightly colored when originally created; the raw stone surfaces found today is due to the pigment being lost over the centuries.
Not Roman, Greek. The Greek sculptures were painted. Roman sculptors found the Greek marble beautiful without paint, and didn’t paint theirs.
Wikipedia disagrees: Roman Sculpture
I think it was the renaissance sculptors that did that, not the romans.
One of Ceasar’s statue was found to have pigment residues. You can find an image of how it would’ve looked like when it was painted.