A squamous papilloma is a benign growth. It is not necessarily a wart. Even if was a wart, you took care of it, and there's not much else to do. There's no way to tell when exposure was even when a bump is definitely a wart. In your case the biopsy casts the diagnosis of wart in considerable doubt, since the pathologist did not find the signs that establish the diagnosis of wart. I advise you to follow the suggestion of your doctor, and to forget about it. I would further advise against more internet research, which is not going to answer any of your questions. I am sure you did nit catch this, if you caught anything, from the sexual contact you describe.
Best.
Dr. Rockoff
addendum to my question
by the way, the lesion being flat and small. I read this is typical of HPV 16 infection. I had 1/2 stroke of penetration and the rest was mainly genital hand genital contact. I did catch chlamydia from her though. So I guess I pretty much did catch HPV 16 from her?
could normal skin also have squamous papilloma? am I infectious? what's the chance of this being type 16 HPV which could be cancerous? would HPV dna typing on biopsy be sensitive in detecting what type of HPV?