In my callow youth I took careful notice (philologist even then) of the use of can vs may in this context. Except for the times our elders were excoriating us for the "misuse" of can for may the only time I heard may used "properly", whether by us children or by the excoriant elders, was in the children's game Mother May I?. We learned to use can from those very elders who upbraided us for that usage.

Post Edit: I haven't the foggiest idea why the font decided to change in midstream.

Post-post Edit D'oh. I had [/i] in front of that may where the font changed. Live and learn.