Thank you for noting the mistake, it was a typo, but it’s fixed now. I edit college textbooks for a living, so while I’m not perfect, I think I know the difference between “who’s” and “whose.”

And thanks for the link to the grammar site, I’m sure it will be very helpful. Though, I doubt you are affiliated with it. Why don’t you link your own site, so I can run my virtual red pen over it?

Anyhow, this site is for fun, so we forgive the harmless typos here (is it OK to abbreviate “typos” or do I need to spell it out? I wouldn’t want to make you go “Huh?” again). I would think that someone name “Mr. Grammar” would be able to understand the meaning of a simple sentence even with a typo in it.