What are your buddies' dietary habits like?
As I understand it, saturated fat is a precursor to testosterone. In other words, testosterone is synthesized from saturated fat.
So, it may be that your buddies are ingesting a shit load of saturated fat, and are seeing higher T-levels as a result.
But don't go scarfing down Yodels and Twinkies just because you want the fat. Obviously we know that despite possibly increasing T-levels, too much can wreak all sorts of havoc on your organs, blood vessels, etc.
Also, horniness is caused by Leutinizing Hormone, not necessarily Testosterone. Alcohol consumption does send a surge of Leutinizing Hormone through your blood. That's why people get drunk and fuck all the time. Why? Homeostasis- your body's way of balancing things. If you ever increase or decrease one hormone too much, the opposing hormone will increase or decrease too in order to keep the body in balance. As is the case with alcohol consumption, drinking drastically reduces Test, and as a result, Leutinizing Hormone is increased to maintain some order of balance.
Bottom line is your non-health conscious buddies may or may not have higher T levels, but their behavior isn't necessarily a good indicator. You're definitely better off being health-conscious. There's more to life than your libido!