Taken as a whole “One failure on top of another”, metaphorically speaking, the poet can be talking about anything. Career, relationship, stock picks and yes, obviously, sex.
It is one of those rare poems, that if one were to read it and not know the title, you would probably get a myriad of differing responses. First and foremost, it might possibly have been written by someone who doesn’t exactly have a positive outlook on life. Perhaps they could be a realist,