I often get tickled by and wrestle with certain male friends, one in particular. It will usually be spontaneous, we'd be at a get-together and suddenly break into some 'fighting' or sometimes he'd provoke me out of the blue by tickling or 'hitting' (used very loosely as it doesn't hurt) me with an object - like a glow-stick last time - and this would again result in some sort of physical involvement (which usually ends with me with my hands pinned behind my back unable to do anything but squirm).
Apart from this, I have never been turned down for a wrestle, tickle, playful poking etc by any guy friend I was comfortable with.
Can anyone explain the reason behind this? I mean, I don't do it with my female friends and they don't do it with their male friends.