This makes sense. 4chan is an image posting site that spams porn and gore used by mostly males. tumblr is an image/blogging site that spams porn and gore used by mostly females. They both have tech sections, anime/video game sections, advice sections and random shit as well as people who spend an unreasonable amount of time on the internet.
These people also spend time bitching about being alone. Well derp maybe they should get along then-have they seen how horny tumblr girls are yet? lol