So, I had a good laugh at this, and I had the urge to post.
I haven't heard this one before, but the best man at this particular wedding said, "So, I've never given a best man toast before. The speech is not supposed to be longer than the groom's ability to make love. So here's to [the bride] and [the groom]!"
Although I wouldn't want that said at my reception, I thought it was hilarious!