The ornmental design for a stick-on condom holder/dispenser, as shown and described.
FIG. 1 is a top, front, and right side perspective view of a stick-on
condom holder/dispenser showing my new design;
FIG. 2 is a top, rear, and left side perspective view thereof, showing the
adhesive backing strip partially removed, with the broken-line disclosure
being for illustrative purposes only and forming no part of the claimed
design;