The ornamental design for bathing suit with rear openings, as shown and described.
The FIGURE is a rear-elevational view thereof, with a butterfly shaped opening at one side of the buttocks, a ribbon-shaped opening at the other side of the buttocks and both openings being surrounded by stitching.
The uniformly spaced broken lines on the surface of the bathing suit represent stitching. The dot-dash broken lines mark the boundary of the claimed design. The remaining broken lines, showing a waistband and portion of the human form, show details which form no part of the claim. The center of the butterfly design is open whereas the other areas are closed. The center of the ribbon design is closed whereas the ribbon-shaped area is open.