Why should I work out?

The benefits of working out/being healthy are worth it even entirely barring the benefits associated with dating. First of all, acknowledge that your mind is inextricably tied to your brain, and you brain is an organ like any other. It may be hard to conceptualize it, but there are very real and tangible benefits to mood and overall mental health that can be attributed to working out and maintaining an overall healthy level of body fat and muscle. Also, please internalize that benefits will never be seen right away, so don't let that get you down. Someone with bad oral health isn't going to have pearly whites after brushing their teeth once. It takes a routine of consistency and diligence to see results over time.

Additionally, the ratio of body fat to muscle is very highly correlated to testosterone level in your blood. Body fat contains a high level of an enzyme called aromatase, which converts testosterone that freely flows in the blood into estrogen. This means that your body's testosterone production may be perfectly healthy, but you'll have low testosterone levels relative to estrogen because of the high ratio of body fat. I should mention that this acts as a sort of slippery slope, as increased estrogen makes your body hold onto fat more, so you may get into a cycle where it's difficult to lose and maintain a healthy level of fat.

On the flip side, if you work out doing strength training to develop muscle, pound-for-pound, muscle is much more energy consuming than fat, so you body's natural BMR (Base metabolic rate) will increase. This essentially means that when you're not doing anything, your body will be burning more calories because the muscle inherently burns more calories than fat (it's also much denser). Being on WSO, I'm sure you're at least somewhat quantitatively-oriented, so I'd highly suggest anyone trying to burn fat to download a calorie counting app, as you can adjust how much you want to lose and how fast. It has the added benefit of making eating a chore, since you have to be diligent about tracking everything you consume, so it makes you way more mindful of what you put in your body.

The slippery slope can be said to go the other way as well, as generally the less body fat you have and as your muscle to fat ratio improves, your body becomes more efficient at partitioning surplus calories into muscle rather than being stored immediately as fat. 

There are countless other benefits, so your sex drive will likely improve and others will see you in a new light. Let's be real, first impressions matter and for better or for worse, people judge a book by its cover. Being athletic and fit makes you look more disciplined and competitive whereas being fat is generally associated with lack of impulse control and low self-awareness.

I'm not a medical professional so take this with a metric ton of salt, but you can easily google and verify all these claims yourself. Good luck!