Well you can freeze the sperm for posterity, literally. Or your can immobilize them with this new little testical bath thing from Dyson. No really .

https://www.news.com.au/lifestyle/relationships/sex/male-contraceptive-bath-device-wins-dyson-award/news-story/8a0e4cbc6a80dad774ac9331ee56430a

I’m so happy men are finally getting some attention.