Finishing

It takes forever!! To get my man to cum when we’re having sex.I can only go for so long before I get sore and raw so usually I’ll just keep going to try to give my man his time to finish but then it will be an hour later and still nothing will come out so half the time I have to end up stoping because I’m in so much pain and raw to the touch. What can I do to make my man cum faster when we have sex?