What should the sexually inexperienced guy say who obviously can't joke his way out of this question say? I think that is the kind of guy who a question like this would cripple...
I like the "I don't Kiss and tell" for that one.
Every time a woman has wondered about my sexual experience, when my answer made them think I was inexperienced they were turned off and when they imagined I was experienced they were turned on. Women in my experience want to imagine that you are popular with and have fvcked loads of women.
So what I settled on was being smooth, by giving vague non-answers dragged out until she projects her own imagination like she wants to.
Just say something like "uhhhh... well..." and shrug your shoulders. She'll prod for more. It doesn't matter what you say, just don't give any actual facts. For example "well... I've had sex" and grin. This process is failsafe because the whole point
is to not think of any real answers, you can just keep going "yeah.. sure", or chuckle and nod, or whatever, regardless of whatever she says. Remember that she wants to project that you are more sexually experienced than even she is, that you're popular with and have fvcked countless women. She will eventually project just that, at which point you just smile and move on.
That's pretty much how I've done it.