i'll say sex is the stimulant for the relationship. without it, the relationship will get dull a little, which need lots of other tricks to spice it up, in which involve money, time, thinking...etc.

so, 'sex' is the easiest and the most efficient way to maintain that only require feelings and love. but then there are many type of sex perceive by many diff type of ppl...

im not sure about that guy, but its pretty pathetic to back off like that. its pretty hurt i know, but hey, how can the girl trust her future with him, with such cowardice whom rather keep distant and avoid her than fix the problem.