A Woman Leads The Way
In modern era the Swiss doctor Martha Voegeli is the first scientific person to report about thermal male contraception (TMC). From the 1930s to the 1950s she scientifically studied this contraception method in India while using it as part of a birth control program there. She provided men with daily seated warm baths and concluded on the effectivness and all the other qualities of the method: it's costless, efficient, reversible, it does not have side effects and does not affect libido, it's natural.
This method does not destroy "life" at any stage of development.