I didn't even want to joke about that on HN, but it did cross my mind. Find a happy healthy person and (somehow) ask them for some fecal matter and do a transplant. Or just start licking butts... ugh
Now a turkey baster with a partner whom has no STD's might be doable.
I once had a perpetually happy virginal, before me, girlfriend whom would have made a perfect donor.
https://www.statnews.com/2019/04/05/your-sexual-partners-can...