So, as you may know I take Enbrel twice a week. Yes, I do inject it myself, typically in my stomach. And I've perfected my needle poke ability over the past few months. I learnt very quickly to run my hands under warm water for a few minutes after washing them before I get started. Not only is this good hygiene, but so I won't go 'Ah!' when I touch my stomach, as has happened when I have cold hands.
But it's pretty funny to watch my reaction to touching my stomach with cold hands. :)