I just love the attention and am very willing to return it in kind.

As to The Chief's question, I know that balls hate to be cold, so they shrivel up to stay warm and the cock just follows their lead.

Why nipples get erect is more complicated, but I think that by becoming erect in cold weather, it helps heat up the men looking at them, who in tern come over and help warm up the gals.  At least that's my theory and I'm sticking to it until a better one comes along.