You can sell everything if you can find proper auditory.
That first girl look like chubby/chunky next-door chick in glasses to me
If you can target her like this, you'll have very good convertion. People frequently fall in for different fetishes. Don't forget that we all here sell fantasies. And there are not only people who dream about hot ideal chicks but there are people who dream about fat ugly bitches in glasses, and even more strange things - like dirty asses or girls changing tampons...
As for me, I don't understand squirting content, creampies, handjobs (not to mention other things), but they seem to be pretty popular recently. At least I see them all over the net for last half of a year. And it sells.
There are people with very strange fantasies, and they often have nothing to do with hardcore at all. Sometimes they not even about explicit nudity. The only question is - are you able to find the people who need exactly the type of content you sell and is there enough of such people to make you any profit?
I have learned also, that I should not try to sell things I do not like and/or understand myself. Most likelly I won't succeed with some particular niche if I can't understand what in this niche makes surfer aroused.