Well, I can only speak from experience. Not one, but two medical professionals got "over" on me! I did have a massage once from a therapist on a flat table. The therapist was trying to access my upper middle back and used their knee to levitate and lean over me. It felt weird. There was a language barrier, so I didn't ask. Another experience. This dentist was pulling a particularly deep molar. He tried everything. Finally, he climbed over me to get a better grip. He did warn me first.