Of course not. Fast food is for people to enjoy a quick meal. It has its own culture related to food, marketing, and customer service. Sexual topics are completely out of the scope and should not be associated with fast food.
No way. Fast food has a well - defined area of interest that includes things like food quality, variety, and affordability. Bringing in inappropriate topics like sex is unethical and goes against the positive image that fast food businesses are trying to maintain. Moreover, it can be offensive to a large number of customers who just want to think about their next meal at a fast - food joint.