One may travel many shag miles to have sex with the right person. However, some
people are either fortunate enough to have their sexual partner nearby.
Others, though, may simply be
lazy or unimaginative and find or remain with their sexual partner simply because they are close to er.. hand. This is a "proximity shag" (noun and verb).
A: We split up because he is too many
shag miles away. You on the other hand...
B: ...live next door. That makes me a...
A: ... proximity
shag.
B: I suddenly
don't feel very special.