Younger top, older bottom?

I am wondering if this age gap dynamic is popular these days. I am not referring to roll play scenes or as a fetish, but rather as a personal preference. It does seem that young guys prefer someone their own age and that it seems more likely that a top man is going to be older than a bottom man.

 

I am a 50yold botton who lives in Boston. 99% of the guys i service are college age guys