At 26 the range of non creepy partners is 18 years (20 to 38 year olds).
At 50 it is a range of 54 years (32 to 86 years old). The same also works with infinity, but even Methuselah died once.
Megan notes that graph-making nerds like Cueball may have a hard time finding dates, but this is belied by the title text.
Don't ask me how I found it : P (some digits are replaced with X for privacy reasons) --Di Ev Al (talk) , 17 August 2013 (UTC) Don't ask you how you found it?
As the graph on the right shows, there is a lower limit and an upper limit.
As age increases, they age range of potential non-creepy partners widens.
The Half Plus Seven Rule is an unwritten rule which asserts that it is creepy to date anyone who is younger than half your age plus 7 years.
For example, a 50 year old dating someone who is 31 or younger would be classed as creepy.
Dunn concluded that "Not once across all ages and countries ...
did females show a preference for males significantly younger than male preferences for females" and that there was a "consistent cross-cultural preference by women for at least same-age or significantly older men".
Thus, both sexes will have to compete and be selective in mate choices.
These two theories explain why natural and sexual selection acts slightly differently on the two sexes so that they display different preferences.
There are also alternative social theories for age differences in relationships as well as suggested reasons for 'alternative' age-hypogamous relationships.