Curled toes

I observe many women have curled toes during the love fucking ! It's often a reaction of orgasm female during the breeding black baby maker. For my wife, it's just a reaction of pleasure.
I would like to ask a question ?
It's the presence of cuckold hubby who watch his wife to be impregnated increases the orgasm of his wife ?
And, any pics can be seen with many curled toes ? My wife loves it.