Is it normal that sex doesn't feel that good to me?

I'm a guy and I don't have sex often for I'm shy, and im def not gay. I tried it, wasnt that interested. Anyways, sometimes when I have sex I can't keep my D hard. It's weird. I love fucking them but.. It's like at first its really fun and exciting but then I get soft and it's embarrassing. The first 2 times I had sex I could keep a hard on for hours but now I've been flaky. My only idea is that I need to hit a virgin cuz im a masturbator. So yeah, from a dude, you are normal. Perhaps like myself and not tight enough pussies, you may have become used to his way of fucking. I say you should change positions often and go at it at different angles. Perhaps add some foreplay, music, and candles to feel more erotic and u may get your game back on! Throw some long hot beats on the stereo and fuck each other to the rhythm. Try some adventurous sex or challenges. Such as fucking somewhere wild. Perhaps your feelings to pleasure him will turn yourself on. Do you try several other tactics to feel erotic with sex? I shall try these methods too, but perhaps my ideas can help you out as well. Good luck with feeling horny and I wish the best of luck and pleasure for you hun!