Go to download.com and get 'spybot search and destroy'.That might get rid of it.If not,then just buy a good adware killer program.
If you frequent porn sites and wander around,your asking for a sex dialer or other unwanted program.
Heres some good free porn sites without the crap.
xmeup.com
free6.com
richardsrealm.com
ultrapasswords.com
that should keep you busy...lol
Later! \m/
Try once,fail twice...