I'm trying to wean myself off wearing socks, at least on the bike. I've done it outside a few times now without incident. I've ridden the trainer a couple of times without socks and those weren't quite as comfortable. I was quite aware of my feet sweating and was concerned about blisters. I have a good fan but it is mostly aimed at my torso/head. I presume outside the wind is getting through my shoes helping some? Is this common?
Subject:RE: Socks on the trainer, sockless outside?
I started using my trainer a couple days ago and the same thing happened to me. The amounts of sweat were unbelievable and last night i used socks. Much better. And same as you, I'm planning on going sockless outside