Welcome and thanks for posting your query to HCM.
After reading your query there are three possibilities of the condition
contagiosum: whitish or pearly bead like structure with central indentation
2. Genital wart: Brownish accuminate( multiple thorn like) structure
3. skin tag: simple over proliferation of the skin
Now as you said you used protection in the form of condoms, but the former two (which are STD's) can occur due to simple trauma or friction during sexual intercourse. So there is possibility of certain STD's (Molluscum contagiosum and Genital wart) despite using condoms. The third one - skin tag is not an STD but can be one of the possibility in bit of overweight
person due to over proliferation of the skin.
Any how, you should meet a dermatologist
who will take care of all of the problem in few minute by simple radiofrequency ablation
, which is actually required to prevent further proliferation.
with best wishes for your health,
Dr Sanjay K Kanodia
MD ( Dermatology and STD/ Venereology)