Why do Christian males have a reputation of being selfish lovers?

Christian males have a reputation of not caring whether their partner is sexually satisfied. It seems that Christian males typically care only about their own satisfaction; they tend to be 'wham-bam-thank-you-mam' type lovers, and then they roll over and go to sleep. Do you find this is true in your experience and why do you think Christian males take no pleasure in the giving of pleasure?