Your question is difficult to address because how you handle this would depend on the child's age.  Your job is actually to make sure, as much as possible, that children are not exposed to this content. If it happens unexpectedly, and the child is old enough to understand this concept (say, by age 7 or 8), then turn off the television and say that "this is for grownups" and see how they respond.  If the audience is teen age, turn off the tv and ask them what they think.  You might be able to have a useful conversation about physical and emotional intimacy.

Jeanne H. Brockmyer, Ph. D.
education.com expert clinical child psychologist