Beauty is pain. One year after undergoing a full facelift, Denise Richards is sharing all the details on her transformative plastic surgery experience. “Originally I had been thinking about doing just my neck,” the “Wild Things” actress told Bunnie Xo on her “Dumb Blonde” podcast Monday. “Then a friend of mine — she’s very well-known and she’s not public about hers — and she said to me, ‘You have to do the whole thing.’ And I was like, ‘I don’t want to do the whole thing.’ I was scared.” The “Real Housewives of Beverly Hills” star, 55, said she had “never done anything” to her face besides a “little Botox” and “some fillers.” However,…