A friend of mine lived there and I visited him a few times. When he had class at uni sometimes I went to saunas (which are 100% naked but not mixed) and was shocked at how BIG everyone was. Proper big, thick, long dicks everywhere, don't think I've seen a dick under 3.5/4" (soft).
Being straight myself I don't know about sex and erect sizes, but I was surprised to see how big they were.