It just seems so wasteful. Part of the turn on to sucking cock, to me, is swallowing the load. If I had one of those big black hard cocks in my mouth, you'd better believe I'm going to be waiting to swallow every single drop. I would love to suck off a guy who blew huge loads of cum down my throat. Yummy.
For my 23rd birthday, my next door neighbor, a 55 year old black man I had hooked up with, invited me over, where he and 2 of his friends were waiting, cocks out, to give me a special present. I sucked and swallowed so much cum that night, I felt drunk.