Listen man , I ' m not saying an entire society fed their offspring alcoholic drinks til there were only hard drinking toddlers left . I ' m just pointing out that people who were better able to tolerate alcohol would ' ve had access to substantially more sources of safe hydration . It provides them with an advantage that another group doesn ' t have . I think it might have functioned similarly to the genes that allowed Europeans to digest lactose . <| sep |> Thank god speedos are dying here in germany . Only old people still wear them . Hopefully it ' s the same in whole europe . <| sep |> Sorry , I missed the bit about OV certs . What do you actually need them for ? To the average user there is no difference between DV and OV certs so I ' d argue their usefulness is limited Amazon , Google and Facebook only use DV certs for example .