The reality is that as we age, the dating age gap becomes more forgivable. Sometimes people get confused or nervous about dating a younger man or woman. To this end I have developed a simple formula refined over the past few years that always, always works. At least, in most of the continental U.S.:
(Age of the 16 years or older person in Question)/2 + 8 = Minimum dateable age of potential mate
Certainly there is some argument in favor of "if they're 18 they're game," but this formula will always work with friends and family (family being the key). At 16 you are dating someone the same age as yourself. If you are 18, you can date a 17 year old, who would be protected by Romeo and Juliet laws in most states. If you're 30 you can date a 23 year old without question; young but acceptable. If you're 60, you're good with a 38 year-old; a huge gap, but nobody will really care; you're old enough to make your own decisions at 38.
Let's use a real-life example. Let's say you're Demi Moore, and that cute up-and-coming comedian is looking pretty attractive. Demi Moore was born Nov 11, 1962. Ashton Kutcher was born February 7, 1978. Today that makes Moore almost 48. This makes her minimum dating age [48/2] + 8 = 32. Kutcher is 32. Excellent job, Moore, you nailed it.
No, Pinto, don't do it!
Note that this formula does not apply to individuals under the age of 16, because I can tell you right now that my kids will not be dating until they are at least 16: Especially my daughter. She's a beautiful and delicate flower. Seriously.
You have to set these boundaries early as a parent, you know.