Before being entangled in an alleged love triangle with two of the Cyrus women, Dominic Purcellwas devoted to a spicy BDSM relationship with former 90210 star AnnaLynne McCord, which spanned for the better part of 10 years, RadarOnline.com can reveal. Purcell, 54, is said to have hooked up with Noah Cyrus, 24, before wedding her mother, Tish Cyrus, 56, last August, and before married life, the Prison Break actor was known for being a stallion between the sheets. McCord is 36 and 17 years Purcell’s junior. The actress dated Tish’s now husband from 2011 to early 2020, and was never shy about the…