Knowing when you're about to cum?

Emily • I like mac n cheese better than most people
I know this must sound ridiculous because it probably is but when my man is inside me he is pretty rough and it feels amazing, but i don't exactly know when i cum so i can't figure out when i'm about to cum and he wants me to tell him before i do. Any give aways as to feelings right before you cum?   know this is aksichaifmaofoa but any thing helps😁