Hello.
First, there’s no way of telling what’s going on with you without a gynecological exam. And I can’t tell you anything about your partner with no information.
If you’re concerned about being “loose,” it’s possible that your PC muscle has gotten weak. The PC muscle is the muscle around the entrance to your vagina. It’s also related to the strength of your orgasmic contractions, so if it’s weak or flabby, your orgasms will be weak and flabby too. To strengthen your PC muscle, do Kegel exercises (named for the physician who discovered this clever little muscle). Luckily, the PC muscle also stops and starts the flow of urine, so it’s easy to locate. Just contract it as though you’re trying to hold back the flow of urine. Got it? Now begin a daily regimen of contracting and relaxing the muscle. It helps to associate it with something you do each day—like taking a shower.
Once your PC muscle is strong, you’ll notice a difference in your orgasmic intensity. Bonus!
Now it may also be true that your PC muscle isn’t weak at all and that your partner has some other issue. Next step: talk with him about it. Good luck! Dr. J
Yes, weight loss can change things. You can do Kegel exercises to tighten things up for him. Those are very good for women of any age and will make your orgasms stronger.