I’ve never had a study, a shed or man-cave. There hasn’t been a real need for me to have one to date, in various relationships I haven’t had the need as we had sufficient levels of space to continue on. If Pip was studying for her Post Grad I was usually working and when I needed space she was often at her work, so it was never really an issue. Mary had her own place and as such we had sufficient space for each other, though I did find it a little grating that it was always her staying at mine and I never spent the night at her place.
I guess in future the need for a study/man-cave may become a necessity but as it stands, not at the moment.