Why is my husband treating me this way?

After 17 years and 3 kids- I complained to my husband about his lack of "romance" Meaning treating me romantically etc. He said "well if I got more sex I would treat you like that - cause I wouldn't be so sex starved". So I did just that - I started initiating sex - dressing in heels and thigh highs in the bedroom etc. Now instead of him treated me more romantically outside of the bedroom the opposite has happened. He treats me like a whore. He makes very nasty sexual comments (not around the kids) - At very inappropriate moments he will stand behind me and grab my breasts or attempt to put his hands down my pants. He thinks all sex should now be "rauncy" sex. Help. All of this has backfired!