Big But Not The Best

I'm not kidding, my boyfriend who's twenty four, has an enormous cock. It's nearly ten inches long and so thick.
It's good when he fucks me, but as I've discovered recently, I much prefer having Frank, a neighbour of ours, fucking me with his fifty six year old, seven inch average thickness cock.
It feels so much better and I cum so much harder when Frank fucks me.
I've always been turned on by older men, so when Frank propositioned me for sex as we passed on the communal stairs, I couldn't resist saying yes. And it's been non stop fucking between us ever since.
I know I'm cheating on my boyfriend, but Frank is just much better at sex.