The ornamental design for the groin area warmingdevice, as shown and described.
FIG. 1 is a perspective view of a groin area warming device showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left end elevational view thereof;
FIG. 5 is a right end elevational view thereof;
FIG. 6 is a front elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a perspective view of the groin area warming device being worn;
FIG. 9 is a front elevational view of the groin area warming device in an unfolded state; and,
FIG. 10 is a top plan view of the groin area warming device in an unfolded state.
The broken line in the drawings is included for the purpose of illustrating portions and environmental elements of the groin area warming device and forms no part of the claimed design.