80 yr old diagnosed with hsv2 first time ever this year swab test. breakouts are on buttocks. had blisters before diagnosed with shingles. a few years ago. went away. would like to know causes and risk to my family getting it? toilet seat etc?

HSV2 transmission: HSV2 is only acquired sexually, usually genital, primarily during years of maximum sexual activity, in your case probably over 40 yr ago. Often asymptomatic, with outbreaks starting later, often near but not on genitals (e.g. buttoks). Only transmitted by sex, not toilet seats, towels, shared bedding, etc. No risk for household contacts. Use common sense hygiene (e.g. hand washing after toilet).