When engaged in sexual activity with my significant other, I have a bit of trouble keeping it up. I don't know why it is. I have a few ideas myself. Never used condoms up until her (I know, I've learned), the act of putting them on is a bit awkward to me, not as fluid. Also feels a lot different. She's very quiet, like barely even moans when she orgasms, I don't find it attractive like a girl who's letting me know what's going on. Poor diet? I don't eat too well, though my weight stays the same along with energy levels. Does anyone have any ideas about this? I have no problems staying hard for an hour or more when I'm by myself. I cant really remember if it's been an issue in the past, but I'm really noticing it now.