Sexdrive- help my friend with his?

Ok my friend has what you might describe as a ‘well developed’ sex drive. Nuclear might be a good word as its longlasting and constant.. It is abit of a problem TBH in a serious way (and also ‘he’ can see others amusement).
Any tips? Ideas? Binners you mentioned gelding, I think he wants it lessening not ending. 😐