leda and the swan

I may be wrong, but this poem seems to be about a male swan having sexual relations with a woman.  pretty strange to say the least.  It seems it is not consensual, so that makes it even worse.  From doing a little research, the swan is suppose to be a greek god "zeus" that has taken the form of a swan to hide his true identity while he rapes this mortal woman who he fell in love with; and would eventually give birth to helen of troy.  I think its almost impossible to tell that just from reading the poem.