Ever wondered what cum is actually made of? Or the science behind an erection? Why do wet dreams happen? What are the chances of pre-cum getting someone pregnant?  Dr Theresa Larkin has everything you need to know about sperm, semen, erections and ejaculations. DM us your thoughts, questions, topics, or to just vent at @triplejthehookup on IG or email us: [email protected] The Hook Up is an ABC podcast, produced by triple j. It is recorded on the lands of the Wurundjeri people of the Kulin nation. We pay our respects to elders past and present. We acknowledge Aboriginal and Torres Strait Islander peoples as the First Australians and Traditional Custodians of the land where we live, work, and learn.