Most people find their sexuality is enhanced when they stop making rules about what they and their partners ought to like and begin to consider what they actually do enjoy. We have to keep our sexual activities within the bounds of what is safe and what does not threaten the freedom of others. However that does not mean we have to strait-jacket our thinking. The books recommended below are intended to be permission giving as is confidential discussion of concerns in counselling. Limited Information Ignorance perpetuates many sexual difficulties.
Most people can expect to experience a loss of sexual desire when they are stressed.
The simultaneous orgasm invariably depicted by film-makers and novelists is not the experience of the majority of couples. Most peoples' sexual appetite and preference change as they grow older. Lack of knowledge about contraception and sexually transmitted diseases can lead to great unhappiness when events occur which might have been avoided. There is a lot of information available about sex - in some ways there is so much that it has maybe become devalued. The books recommended below contain much useful information and are a good place to start.