On his 115th birthday Mortensen gave his advice for a long life: "Friends, a good cigar, drinking lots of good water, no alcohol, staying positive and lots of singing will keep you alive for a long time".
Na svoj 115. rođendan kazao je: "Prijatelji, dobra cigareta, pijenje puno dobre vode, izbjegavanje alkohola, optimizam i puno pjevanja pomoći će vam dugo živjeti. "