testicles; testes: Part of the male genitals.

testicular torsion: A severe and painful medical condition in which the testicle gets twisted around inside the scrotum and blood no longer flows into it; requires immediate attention.

transurethral resection of the prostate; TURP: Most common form of surgery for an enlarged prostate; common side effects include erectile dysfunction and retrograde ejaculation.

tribadism: The practice of two women rubbing their genitals together while lying one on top of the other.

trichomoniasis; trich: Sexually transmitted disease; curable with medication.

tubal ligation: Contraceptive method in which a woman undergoes sterilization via surgery of the fallopian tubes.