Have you noticed that we tend to copy the behaviours of those we admire most? Judging by what he says and does, I'd suggest that Richard Dawkins admires Bertrand Russell.
(Although Russell is often quoted by atheists as one of their champions, he was an agnostic, by his own admission.) "He was a regular visitor at Garsington, the country estate of Lady Ottoline Morrell with whom he had a long affair.
In 1921 he divorced and married for the second time to Dora Black, with whom he set up a progressive school.
During the late 1920s and early 1930s, as his marriage to Dora broke down and as he lost faith in Beacon Hill, Russell continued to write books intended to emancipate readers from what he saw as the fetters of outmoded religious belief, restrictive marriages, repressed attitudes towards human sexuality.
In 1936 he married for the third time to Patricia Helen Spence. "
"Bertrand Russell, Biographical Notes," Mantex.com. http://www.mantex.co.uk/ou/a319/russell.htm>(6 November, 2006).