Suck It and Read

Now where does one start to write To find the courage he has to pluck And write a poem for a contest It's all about things that suck Out there, there are so many places Where this word can always be used There are octopuses in our seas And their suckers are used so true Even in the medical world They use leeches to reduce blood swelling Their active anticoagulant Is a marvel in their telling There are women of ill repute Nothing like sucking on a sweet A hard neck never deters them Vampire bats do it to eat There are others in the animal world Yes, limpets when they grip their locked And back to the ladies and ******** Yes the sweetie I meant was rock Then there are the ones who are gullible Like a vacuum they become sucked in There is nothing wrong with the word suck Using it, is never a sin