> especially through sex, kissing, or touching

To what extent can it be transmitted via "touching"? And other mechanisms since it says "especially" implying there might be others.

As a man approaching 40 I've never considered this vaccine because I've only ever been (and ever will be) sexually active in any way with my wife, who has been the same with me. Is there any reason to get the vaccine in my situation? I see a lot of comments here that we all should get it, but if it's just sexually transmitted I don't think there's a reason for me to.