Dear Dr. Betty,
I recently met a guy with whom I clicked within the first minute. The feeling was mutual and we're attracted to each other. He is smart, conversational, confident, kind, and owns his company. Handsome and fit, I gave him the green light to kiss me. Kissing is so blissful and it's the key that ignites my engine. If a guy doesn't know how to kiss me, I move on. During a wonderful makeout session where we begin to explore each other's bodies, I discover that his erect penis is slender and smallish, about five inches.
I now know what I like and that's a guy with at least seven inches and with girth. I just love the fullness of a large cock going deep into my vagina. Dildos, fingers and oral stimulation are fine for a moment, but the sensation of an endowed cock is the best. Nonetheless, I decided not to consummate this session because I felt that this nice guy wouldn't be be able to satisfy me with his small dick. Please tell me and your audience what is the appropriate way to let a guy down easy without being blunt.
Your description of this guy made him sound so cool it's a shame you prefer bigger dicks that are so often attached to less desirable men when it comes to sexual skills. Yet I applaud you for realizing clearly what you want in a sex partner. Now as to your question. Since this sounds like it was just one date and not all that serious, my best solution is to simply tell him that you'd just met a man that you really fell for and would be dating him exclusively for now. It seems most men will allow for letting a woman go if she's clear about "falling in love" with some other dude. It's when we make excuses to avoid dates or when they call and we hum and haw fearful of hurting his feelings. None of that works. Most men will honor losing to another guy. But when we make excuses, that's just a challenge that most men will feel obliged to counter head on.
PS One of my best and long term lovers had 5 and a half inches of penis that could stay hard forever. He also had incredible manual skills, a great sense of humor and was comfortably set financially. Today, they make realistic dildos I swear are close to the real thing. After I wore out the "realistics" I ended up falling in love with my black obsidian volcanic rock hand carved beauty. The most perfect sized dick can often be attached to an absolute jerk. Lovers beware.