Hello,
From the symptoms it can be seborrheic keratosis. It is a benign skin growth of keratinocytes. A skin biopsy will be helpful in confirming a diagnosis.
I sincerely suggest you to consult a dermatologist and get it evaluated.
Hope it helps. Take care and please do keep me posted on how you are doing or if you have any additional queries. Kind regards.
It sounds like you should see a Gynecologist to check things out to be safe. The partner could have it, it could just be hibernating. It sounds like it is just the way you are.