a catheter includes a proximal section that is inserted into and telescopically movable relative to a distal section . a proximal end of the proximal section is insertable into a urethra of a user and the distal section provides a discharge conduit for urine . the proximal section includes a rear portion , and an exterior surface of the rear portion diverges away from the proximal end to provide a diverging rear transition section that is wider than the proximal end of the proximal section . the distal section includes a front portion and an interior surface of the front portion converges to an opening formed in a front transition end , the opening is narrower than the diverging rear transition section of the proximal section .