It's a pretty sad state of affairs when, even with such a cute, innocent series like this, some people just can't help their minds from slipping into the gutter and regurgitate the filth they find there.
@kenx If you're referring to the cover of Gal☆Cleaning!, they don't look similar at all to me.
@Liquidxlax The freedom of hiding behind avatars on the Internet allows anyone to be as vulgar and indecent as they want as often as they want, saying things they would otherwise not say in public. Just because I could say, "A bunch of raptors tried to rape her while she was drunk" doesn't mean I should say it lest I want people to think my IQ is less than that of an orangutan. Although @Qelix's comment may have been inspired by the above-mentioned series, this particular quoted comment appears to be simply a juvenile's attempt at vulgar humor.