I skate in hockey skates, but for recreational purposes.

I am wondering if one should really wear two pair of socks? When I was buying skates, they guys in the shop adviced me to wear them, but now when I am suffering ugly lace bites I doubt the logic behind it:

• the skate feel is more puffy, because of all cushioning from all sides
• the foot is placed higher
• I cannot insert anything extra in front, because there is already very little room inside skate

So maybe it is all wrong, and I should go with single pair of socks, get maximum fit from the skates, and forget about wearing anything extra because of the folk-tradition?

I am not looking for opinions, I am looking for hard reasons (and late update: it is from fit perspective, not insulation/warmth).