I think yourage /2 +6 works fine. Assuming both parts are through puberty.
I'd only date someone my age.
I'd allow someone to be 1 year older, MAX!
2-3 Years is fine by me but no more.
I'd allow 4-5 years but thats it.
5-7 years, just like you Devil Man!
7-9 years, but that's pushing it.
10+ years because I'm not very fussy
20+ years. I'll date anything you put in front of me
40+ years. I am a filthy pervert 

I think yourage /2 +6 works fine. Assuming both parts are through puberty.
everything is wrapped in gray
i'm focusing on your image
can you hear me in the void?