finishing once? Sometimes he finds it hard to even get an erection.. Recently he finally got an erection, we had sex.. he finished first and then was not able to get up again. Is this something I should be worried about? How should I react when something like this happens? I find myself getting jealous of my other girl friends who are having amazing sex. I also find myself comparing our sex to past relationships I have had where there was tons of sex and NO sexual issues. I know this can't be good....