Going back some 25 years I contracted genital warts from a Chinese lady in Singapore.
About 8-10 of them, not on the penis (condom on), but the surrounds and not overly uncomfortable from memory.
The treatment a GP prescribed was to burst/break them each day with a small sterilised needle and then apply some cream.
Took 10 days and worked a treat, although when I think back it seemed to be a risky method in terms of spreading them.