Default between one- and two-handed use

[Lord Azagthoth]

The GM can forbid upgrading Attributes after character creation. How does a player gain IQ? Not by learning, he just upgrades his skills.

ST can be upgrades if the player spends lots of times pumping iron and HT can vary by the food he consumes (vitamin supplements or junkfood) or personal hygiene. Once you're an adult, the DX and IQ Attributes you have are it.