I'm the youngest of two.- My closest non online friends(excluding my Master) are within 10 years of my age (youngest non online close friend is 26 and oldest is 37- I'm 34.) - closest online friends tend to be more diverse in age. So I relate well to all ages-tends to be interests that attract with age being secondary.

Sexually it's chemistry rather than age- but my sexual partners aside from one have all been older than me- my Master is 26 years older than me and we definitely relate on *all* levels.