My brother has a STD and I think it’s either herpes or syphilis. He sometimes wears my clothing and I was wondering if by any chance Syphilis or genital herpes can spread that way.

I let him borrow some of my swim trunks, that had been washed and clean and unused for a month or so. Could this have caused him to get the warts. He did also have sex with a stripper in this same time span, but said that she had no signs of warts.