1. Gay bashing doesn't make you sound masculine. Just ignorant and possibly insecure in your own sexuality.
2. Suggesting that your penis might poke someone's eye out doesn't ACTUALLY make your penis any bigger. Nor will anyone think you have a large penis. They might however think you are compensating for something.
3. Making fun of the mentally handicapped stops being funny right around the third grade.
4. If you should ever get called out for being completely tactless, listen to what is being said, apologize, and then move on. Justifying ignorant comments does not make your comments any less ignorant. In fact, it usually has the opposite effect.
If all else fails... before posting something that you think is terribly clever, ask yourself "What Would Peyton Manning Post?"
And EVERYONE knows that Peyton Manning would never make fun of mentally handicapped kids.