Thanks for the query to ATD for an opinion,
The atypical appearance of skin tags around the anal canal following an anal intercourse are likely to be anal warts secondary to HPV infection or a herpes HSV 1 manifestation. This is transference of an std from your partner to you. please get a swab test for culture and serology to isolate the cause and confirm/ rule out the viral cause and also get an STD screen done.
If possible you can send the pictures of the skin tags which can help us diagnose in a better manner.
I hope I have addressed your concern,
Wishing you good health,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.