Guys do eat semen! Gay guys eat semen all the time. Even some straight guys like eating their own semen.
Smegma at one time was suggested to be carcinogenic (cancer causing). However in recent studies the American Cancer Society has rejected this suggestion as a myth used to promote Circumcision. Smegma is nothing more than the build up of dead skin and secretions of the urethra and glans, as well as urine deposits trapped under the foreskin. If anything it is a sign that the penis has not been washed... in a while. While it may not be bad for your health, it won't do much for your breath.
Many guys like to taste and eat their own semen. There's nothing abnormal about it and its not bad for you.
The majority of guys do not like other guys semen. (sperm is what swims in your semen) Some guys who are not bisexual or gay might like semen in general. Not all bisexual and gay guys like other guys semen. Those bisexual/gay guys who like other guys semen... like it a lot.
Eat fruits and veggies to help with the odor. As far as normal odor.... you'd have to go around smellin other guys semen. I'll leave that up to you.
salty egg whites
you can swallow the semen. yes, some people do it because it is a "turn on".
Well guys are guys you cant help the way of life.