RSVP Protocol - playing the field

You may remember when the word "item" came to mean the recognition of two people as a couple by their mutual friends, and the realisation that each was "with someone" (perhaps as yet unspecified, but definitely a someone) among non-mutual friends and family. So basically this means they were "off the market" at least for now.

How does this idea work on RSVP? I feel a bit dirty accepting kisses left, right and centre while being in email contact with someone. Perhaps I'm old fashioned but that $10 stamp represents a commitment dammit! Or, in business terms, at least an investment.

I'd like to coin a new phrase "pre-item" to indicate this predicament. This would mean that while it may not be a mutually agreed status, at least you want to keep your own conscience clear while not putting other interested parties off permanently.

Here are some ideas for KISS reply messages while you consider yourself a pre-item:

KISS reply. Thanks for the kiss. I'm flattered by your interest and I like your profile. I'm a pre-item with someone just now but if it doesn't work out, I'll let you know.

or:

KISS reply. Thank you for kissing us today. Your kisses are important to us and you have been placed in a queue. You will receive a kiss in reply as soon as we are out of item or pre-item status, or if we choose to play the field a bit. Please hold, or send a 'hmmph' if you wish to return to the switch and try someone else.

or perhaps:

KISS reply. Wow! This is a smorgasboard, would you like a threesome?

I'm sure other people can lend their suggestions here. :)