Does the half your age plus seven rule work?
I’m 26, so lets take my age and half it: 13. Now, add 7 and you get 20. This is the lowest age I can date without it being to weird or creepy. Dating someone younger can help bring some fun into your life, it can force you to try new things you may not have done as a mid 20 something, it can be exciting, it can make you feel really old or sometimes make you feel like a kid. Unfortunately it can also lead to friends and family suddenly becoming relationship experts, questioning your choices.
Artist Cassandra Calin has experienced all of this first hand and this lead to a comic series which anyone who has a younger partner can relate to. In the end though, age is just a number, most people are just happy to find someone who makes them happy and willing to put up with them, regardless of age.