MasterOLightning
Optimator
Divide by two, add seven is a good rule for men who want to date younger women. It doesn't apply to much else. I'm 28, so 42 should be the highest I go and 21 the youngest. Would clearly bang above or below those numbers if the situation was right. 21 is the lowest I would go for dating, but the highest is realistically about 33, and I'd have reservations going above 30 or so.