Why Attack on Titan is a flawed anime

As a big fan of AoT, one big plothole that has always bugged me from the first episode is the exclusion of genitals. As titans are very clearly based on humans, and canonically are created from humans, why did Isayama decide to exclude Titan genitals? I am not a homo, (I have 2 girl friends) but seeing Eren transform into a titan with a 12 foot long cock as the people of Marley watch in horror would easily made this anime my favourite of all time. I think we should cancel Isayama on Twitter and get him to realise his mistake and redraw his previous chapters accurately.