New way of heating! :)
I don’t think I’m being that original but here’s another good, safe and clean way to heat yourselves.
Take an even glass of water (same base and top diameter), put it in the microwave, take it out, mix it with a spoon, put your dick in and press it against the pubic bone!
The heat will remain there for quite some time, it’ll be even to all the penis and there’s no need to re-warm. :)