Family guy episode when peter kisses a lady with a funny laugh?

ok so there is a family guy episode when Peter does one of his flashback things and he is kissing this girl by a fireplace...he kisses her neck and she begins to laugh like a man or sumthing like tat...so if anyone knows wat episode this is please let me know....i dont know wat else happens in the episode i cant remember but tats the part i remember the most... so ya please help