[Roger explaining the "secret ingredient" in Francine's potato salad]
Roger: Last night I ate all your potato salad, and I tried to make more but there was no mayo, so instead I used... [to Francine] Well, pull my finger.
[Francine does so. Roger's milk squirts out of his breasts. Francine, Heyley and Steve vomit in disgust]
Roger: Mystery solved.
Stan: I don't get it. So what's the secret ingredient?
Roger: Last night I ate all your potato salad, and I tried to make more but there was no mayo, so instead I used... [to Francine] Well, pull my finger.
[Francine does so. Roger's milk squirts out of his breasts. Francine, Heyley and Steve vomit in disgust]
Roger: Mystery solved.
Stan: I don't get it. So what's the secret ingredient?
[Roger explaining the "secret ingredient" in Francine's potato salad]
Roger : Last night I ate all your potato salad, and I tried to make more but there was no mayo, so instead I used... [to Francine] Well, pull my finger.
[Francine does so. Roger's milk squirts out of his breasts. Francine, Heyley and Steve vomit in disgust]
Roger : Mystery solved.
Stan : I don't get it. So what's the secret ingredient?
http://www.tv-quotes.com/shows/american-dad/quote_16146.html
