...are you sure SFBE has that big of a penis? Well, then again, compared to Shiti's body in relation to the size of his anus... In fact, based on the HQ photograph you have there, I'd say that SL is about 90 percent ANUS (plus it's contents)...
Also, Shinichi has so many namefags' semen in his anus, that I'm beginning to suspect that he collects it. Naw, it's not tight enough to hold it all in...