This book is written for males – all males. It concentrates on heterosexual males, because I fit into this category and know the most about them and each chapter is broken in 3 parts – for young, never married  heterosexual males, and this is the main section, for same sex males and this will include specific information pertinent to them that is not included in the main section, I have little actual knowledge of this, so I apologise in advance if I get it wrong, and finally for males who have been married and divorced or widowed, again anything included here is pertinent to them and not included in the main section.