Not a silly question at all! I'm 2.5 months post op. I find my libido varies wildly due to the fluctuating hormones. Some weeks I just don't care for any type of contact, some we're intimate 3 or more times a day lol.
Physically, sex feels the same (then again I haven't lost a large amount of weight yet). Still have the energy and endurance I did pre-op, nothing hurts, we can do all the same things we did before. I may be a tad more flexible now, but that may be due to working out and stretching. A fun little result of losing weight is that my boyfriend has an easier time picking me up now so that's a thing.
Now this might just be me and I should probably start scheduling sessions with my therapist again, but I find that I'm a lot more aware of my body and self conscious than I used to be. My partner still finds me attractive and has said that he'll be just as attracted to me when I get to 120 lbs as he was when I was 250 lbs. But, sometimes before or during sex I'll be very aware of my rolls or belly or some other imperfection and get really depressed and turned off. Keep in mind, most people will probably get confidence boosts from losing weight so this likely won't happen to you!
Side note: Fertility will improve as you lose the excess weight. If you aren't already, you'll want to get on some sort of birth control (pill, nexplanon, etc). Condoms are still necessary if you aren't in a committed relationship.