Why does the US military buy so much Viagra? bbc.com

Amid the fall-out from US President Donald Trump's announcement on Twitter that transgender people will not be able to serve in the US military, one statistic has been frequently raised to draw attention to the comparatively small estimated costs of transgender healthcare.
It refers to the amount the Pentagon spends on erectile dysfunction medication annually: about $84m (£63m), according to the Military Times newspaper.
In contrast, the Rand Corporation think tank estimated last year that gender transition-related health care costs for transgender personnel would increase the military's active duty health budget by $8.4m per year at the most.