Did it feel good?
Was it hot for you?

Why are you second guessing his reaction? If he was responding like this, I am guessing you were tingling his fancy and satisfying him. I am surprised you are being so insecure with a 7.5 inch penis.

Dude, learn to be a good lover...no matter what the size. Learn to satisfy your partners...most of it is not based on your girth.