my wife and i have had "what-if" conversations before and i always tell her that i'd be eyeing up broads at the wake LOL...we have a wonderful relationship and i HATE sleeping by myself!
truth-be-told, if my children were still pretty young, it would probably take me a long time to develop a level of trust that would allow me to enter into another relationship...they (my kids) would be my first consideration...i know way too many people that got mentally fucked up when their mother or father remarried after the death of their spouse and the whole "step-parent" thing didn't work out so well.