That people into BDSM have them.
A recent study confirmed that people who are into BDSM are typically highly educated. More than one-third had a university degree, with an additional 21% having a college degree. 70% had a higher education (ie, bachelor’s or master’s degree), compared to 34% in the general population.
I can’t say this particularly surprises me. Most people I know who are into kink enjoy the intellectual component as much as if not more than the physical one.
Check out the full study here from Sexual Medicine.