In the distant past ( about 20 years back) I made the acquaintance of a Domme. Lovely, quite attractive young woman, and more so attired in a nurses’ white cap and starched white uniform. A role play nurse who after giving me TLC and attention found it was my turn to minister to her. I’d have her get on the exam table, lay on her stomach. I’d push her white uniform skirt well up over her nice thighs and hips. I’d slip my hands beneath the elastic waistband of her white cotton panties, peel them back and pull them down. I would tell her to spread her legs. Great view!
I’d put on an exam glove and with a liberally lubricated finger of Vaseline, rub it in around her hirsute anal opening. Glove removed, mercury thermometer gotten, shaken down, held up and read. Then the thermometer’s pear shaped bulb, was slowly and deftly inserted as my free index finger and thumb held her cheeks apart. “Made my tongue hard” seeing her like this, but no sex ever between us.
As the bulb touched and entered her anus I had the glass numbered rod positioned so I could see the column of mercury race up the instrument past the temperature number markings (F), Most of the time stopping at 98.6F, though on an occasion or two, somewhat higher.
She moved on to other places. The sessions were over, but they were great as are the memories.