I noticed you deal with all sorts of questions, so I thought you might solve one I have about my wife. When the weather is warm and we sit in the sun, quite often she asks me if I will go nude, even in our garden. I don't have a big penis — it's two inches soft. Why do you think she likes me to show it? I'm puzzled.
I'm a little puzzled, too — not by your wife's motivation for you to go streaking in the garden, but by your surprise at her propositions. It sounds like you've got a pretty good thing going on, so why not get nude in the privacy of your home turf? Unless your garden is exposed to the public, in which case, take your naked party indoors.
That said, I can totally see how being the only one walking around in your birthday suit might feel a little awkward. I'd want company. So here's a question: Does she want to get naked, too? It could be a great way to appreciate each other in all your natural glory. It might even lead to some hanky-panky, and that's always fun.
Feeling insecure about your penis size? Don't. I'm assuming your gal has seen it, and it sounds like she likes what she's seen. She's seeking new ways of being intimate with you and exploring her adventurous side. Welcome that enthusiasm with open, bare-skinned arms!