Automatic Watch Winding

[trando]

I have 2 automatic watches - a 2012 Rolex GMT 2 and a new IWC Portofino which I have recently bought. I wear the IWC occasionally, primarily when I'm wearing a suit, as the Rolex is a bit bulky under a shirt sleeve. My question is this: does it do any damage to either watch to have to regularly wind them up by hand?? Inevitably when I change watches, the other one has stopped...

I know I can buy a watchwinder but I am not a great fan of them, but if I am damaging either watch I will do so.

Advice please.......

[trando]

Thanks all. I am using the crown (fully extended with a stopped second hand) to change the date more than i am winding to be honest. Unless I'm missing something on both watches and you can change the date without having to wind the hands?