The 70-year-old actor - who boasts he has slept with over 2,000 women -
confessed he needs help in the bedroom when he is pleasuring more than one
woman.
He said: "I like to date a nice range of women each year, but I only use
Viagra when I am with more than one."
Jack, who jokingly claims his life has been "one long sexual fantasy", also
revealed he is considering writing his memoirs, but is worried it might get
in the way of his day-to-day existence.
He added: "Sometimes I think to myself, 'Well, Jack, you have met a lot of
people over the years, there might just be some interest out there in you
recalling some of them.'
'But it would be a bit like taking a picture of the Grand Canyon, it would
get in the way of being there."