Is it good or bad to swallow sperm? thanks

If you want to: It doesn't really matter to me. Do whatever you like. It's neither good nor bad. There is, however, always the potential to transfer an infection, but that has nothing to do with the swallowing or not.

Up to you! But . . .: Swallowing sperm is neither good nor bad as long as choice is up to you ie you're not forced to do so against your will. However, this assumes sperm donor is free of sexually transmitted diseases/infections. So unless you're absolutely sure, it's probably best to avoid doing so outside of mutually monogamous relationship. Check out http://goo.Gl/umakiv & http://goo.Gl/r6bczi.