What would be the cause of a normally 3.5-4in flaccid penis and normally hanging testicles to suddenly shrivel up. The testicles tighten up like when it s freezing cold outside and the penis shrinks to about 1.5-2in and in the penis shaft directly between the base and head it ll be squeezed as if there s an invisible band tightly around it. Also I m circumcised and the foreskin gets real tight to where you can hardly slide it. Happens every now and then, just want a pro opinion. Thanks