Of course he did.
Superman was a red blooded hetero and every red blooded hetero knows that, if you gave a secret signal watch to your GIRLFRIEND she'd be using it to check up on you every fifteen minutes:
"Superman, honey, be a dear and run to Paris and pick up some fresh brie for me....can you drop off this dress at the dry cleaners....why haven't you called...Why are you so distant lately...We never talk anymore...what do you mean you're on a case...all you ever think about is your career....etc."
;-)