Had a patient that would do this at the slightest touch; I had to apply anal cream to her anus. Before I showed up, she would be spread eagle on the bed, waiting for me. She'd give me the biggest smile and stare at my bulge, sit there and moan and spread her pussy. The first thing she'd want me to do is apply her cream, which usually led to clit play and fingering. She'd Jack me off while she squirted all over me.