

What is a testicle bath?
Sep 13, 2025
The podcast explores a groundbreaking male contraceptive method known as the testicle bath. This innovative device uses ultrasound heat to temporarily stop sperm production. It raises intriguing questions about the limited options available for male birth control compared to women. The conversation touches on societal perceptions, the need for better communication, and the scientific advancements surrounding male contraceptives. Could this be the future of family planning for men?
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Male Contraception Lags Behind
- Male contraceptive options remain very limited compared with many reversible female methods.
- Social attitudes are shifting but medical choices and communication lag behind.
How The Testicle Bath Works
- COSO, nicknamed the testicle bath, uses ultrasound heat to temporarily halt sperm regeneration.
- The device requires filling with water, temperature control, and a few minutes per session to work.
Origin Story From Rebecca Weiss
- COSO was designed by German engineer Rebecca Weiss, who won a James Dyson Award for it.
- Weiss developed the idea after stopping the contraceptive pill due to a cervical cancer precursor diagnosis.