I do not think this fits the signs and symptoms of prostate or testicular cancer. Dampness in the groin area
is sometimes expected since these areas
of the body (eg armpits, groin and in women beneath the breasts) are usually covered. The warmth , sweat and moisture may cause the sensation of dampness.
Prostate and testicular cancer may present with changes in urinary patterns and sexual responses.
Do you perform regular testicular examinations ?