Muscle Strain or Overuse Injury: Given the symptoms of pain in both inner thighs and discomfort when putting more weight on one leg, a muscle strain, particularly in the adductor muscles, is a plausible explanation. This condition is common, especially in individuals who engage in sports or activities that involve sudden stops, changes in direction, or direct blows to the thigh area.

Urinary Tract Infection (UTI): The discomfort during urination and the feeling of pressure preventing a steady flow could indicate a UTI. This condition is more common in women but can occur in men as well, especially with advancing age or in the presence of other urinary tract issues.
Prostatitis: Inflammation of the prostate gland could cause pain in the groin area and difficulties with urination, including a weak or interrupted flow. This condition is more common in men under the age of 50.
Hernia: A hernia, particularly an inguinal hernia, could cause pain in the groin area that may radiate to the inner thigh. It might also cause discomfort when coughing, lifting, or bending over.

Testicular Torsion: Although less common, testicular torsion is a medical emergency that requires immediate attention. It can cause severe pain in the testicle, groin, and lower abdomen, and might radiate to the inner thigh. Delayed treatment can result in the loss of the testicle.
Kidney Stone: A kidney stone can cause severe pain, often described as crampy, that can radiate from the back down to the groin area. The pain can be associated with urinary symptoms such as difficulty urinating or painful urination.
Aortic Aneurysm or Aortic Dissection: These are life-threatening conditions that can cause severe, tearing pain in the abdomen or back that can radiate to the groin area. Although less common, they are critical to diagnose promptly.

Osteitis Pubis: An inflammatory condition affecting the pubic bone and surrounding structures, often seen in athletes. It can cause pain in the groin area that might radiate to the inner thighs.
Pudendal Neuralgia: A condition characterized by pain in the distribution area of the pudendal nerve, which can include the groin, perineum, and genital area. The pain can be exacerbated by sitting or certain activities.
Avulsion Fracture: A fracture where a fragment of bone is pulled away by a tendon or ligament, which can occur in the pelvic or thigh area, causing localized pain and potentially radiating pain to the inner thigh.