I used to browse a couple of the sites for fun before they figured out to require logging in. I doubt you would be the least attractive person on there.
And yes, sugardaddyforme.com does have Sugar Mommas.
I wonder why Sugar Daddies are split into straight & gay while Sugar Mommas and Babies can be either.
That is a bit odd. What's a young straight bloke who latches onto a rich older woman called?
Lucky doesn't count