nin0
The thing is to get good warm up deep. There are many reasons you should keep in mind when thinking of warming up, some of them :
1) Preventing injury
2) Getting good blood circulation
3) Getting a temperature that will help you expand the parts of your penis you want to expand.
4) Making the work out sessions easier.
For me, being quite a newbie as you seem to be (I am somewhere in the 40th day), preventing injury is the #1 reason to warm up. I don’t care so much about gaining as I do to keeping my penis at least as it is : healthy. Yesterday (as you can see in a topic I made in the newbie section) I got one of the nastiest side effects of PE called discoloration. The bad thing about it is that it seems to be permanent in most cases and having a differently colored penis (dark in parts white in other parts) for a long period of time (estimated in months, years or maybe lifetime) is something I do not want. There are many injuries that will be gone after you take some time off PE and many that won’t. Discoloration seems to be one of them and it is more possible to avoid it if you proceed carefully and warm up good. Do me a favour and search about discoloration…
So, my advice would be, do not experiment with different warming up ways since you are new and unconditioned, as much as you can, avoid experiments at least at the beginning.
About the heater, the way i see it, it has one major disadvantage : DRY.
Perhaps, warming up with a rice shock at start and at the end is the best way to go and having the heater near you while you work out will help keeping the temperature at the point you reached when you warmed up.
Anyway, as I said I am just new here and what I think is from short experience.
Good luck with PE ;-)