Why do parents name their sons women names?

Pretty much all the names you listed were all originally male names.

Ashley was originally bestowed as a male name in England in the 1800's, it didnt become popular as a girls name until around the 80s.

Courtney again, originally male with french origin, most popular for males in the 20's-40's

Shannon is originally a gaelic boy's name and in Irish it has always been a boy's name.The use of it in Northern American as a girl's name is actually not the original intent of the name

Stacey is a boy's name of Greek origin. it became completely feminized in the unisex name revolution of the seventies.

The name Jazmin is actually unisex in certain coutries (such as India) 

This goes the same for many names such as Sidney, Reese, Lesley, Vivian, Beverley, Cassidy, Mackenzie, Shelby, Lauren, Whitney, Madison.

"Stacy" was in fact a boy's name, too, in the past. A famous actor in the 1970s and 1980s was named Stacy Keach. 

There are also several men named "Ashley" and some were born decades ago. See: https://en.wikipedia.org/wiki/Ashley_(name)Same goes for Courtney: https://en.wikipedia.org/wiki/Courtney and Shannon: https://en.wikipedia.org/wiki/Shannon_(given_name)

These are not "women names" they are just ... names. Like Chris, Pat, Franky, and others that are used across genders. 

I knew a boy  named Stacey when i was in school.  It haven't heard it since.  Til now.

Because, when the baby is born , the parents brains are often 'scrambled' ,by people and the newcomer. 

People do not think hard enough concernring the name they give their children. 

Jasmin is silly for either sex to me.  Courtney, Shannon, Ashley and Stacy were ALL boy's names before they were girl's names.  I prefer all of them for boys.

Those used to be all male only names.

Some names are considered to be unisex and can thus be used for either gender. Some names might be unisex in one culture but not in another. It is not uncommon to meet men from the UK called Hillary or Leslie or Lynn, but those names are not considered masculine in places like the US. I have known several men called Tracy. So what? If you don't like those names, don't give one to your kid. Simple. 

Because they Are gay 

I don't know about Jasmin, that's a first, but Courtney, Shannon, and Ashley are all fairly widely accepted names for males as well as females and very likely started as masculine names. 

Courtney, Shannon, Ashley were all originally male names.  The same is true of Avery, Addison, Cassidy, Dana, Harper, Leslie, Reese, and many others.  

Stacy is a nickname for the Eustace, which is Greek in origin.