“…Historically, research has attempted to define the heterogeneity in OCD symptoms by classifying OCD according to predominant symptom domains. For example, the Dimensional Obsessive-Compulsive Scale (Abramowitz et al, 2010) contains four theme-based dimensions: contamination (e.g., obsessions about germs or illness, often accompanied by washing/cleaning compulsions), symmetry/incompleteness (e.g., "just right" obsessions often accompanied by ordering/arranging compulsions), unacceptable thoughts (e.g., violent, sexual, or religious obsessions and rituals or covert neutralizing compulsions), and responsibility for harm (e.g., obsessions about causing a harmful event through injury or bad luck and checking compulsions). However, the content of obsessions can take on virtually any theme, with lesser known presentations such as relationship OCD (e.g., doubts about the "rightness" of intimate relationships), sexual orientation OCD (e.g., unwanted fears of being a different sexual orientation); perinatal OCD (e.g., fear of stabbing one's baby); and even the colloquially termed "schizophrenia OCD" (e.g., fear of developing psychosis), which are often followed by checking, avoiding, and reassurance-seeking compulsions (Abramowitz & Braddock, 2006;Doron et al, 2014;Fairbrother et al, 2022;Jones, 2022;Pinciotti et al, 2022).…”