I was a paid male companion for ladies for a while, more commonly called a male escort.
I would escort wealthy, older (than me, not always old) ladies to dinners, operas, plays, concerts, museums etc and of course provide sexual services if asked.
They didn't always want sex, in fact as most of them were married I was often just providing them with male company.
However, when they did want sex, my job was to pleasure them and not to think about my own pleasure at all. This means no penetration at all, unless they were absolutely begging for it. Which of course did happen.
A lot of the time I didn't even take off my suit trousers, or even my shoes! I used fingers, tongue and toys to give them as many orgasms as they needed.
The problem I hear from female friends is that most men seem to think sex is just for the man to orgasm and they don't really put in enough effort for the woman.
Try keeping your dick in your pants, until she has an orgasm, then ask her if you can enter and have your turn.
Your job when having sex is to ensure the other person's pleasure, not your own. Your pleasure is her job and if you do your job well then she'll hopefully do hers well.
Think like a chef, the enjoyment is seeing the person love the meal you cooked, not eating it yourself.