A quiet place filled with one's favorite porn videos, magazines, tissues and the occasional blow-up sheep.
I just added the new Jenna Jameson video to my spanktuary.
Spanktuary (noun): A special place in one's home dedicated specifically to masturbation.
1.) I'm going to spend some time in my spanktuary after work this evening.
2.) Our son has been frequenting the family spanktuary quite often as of late.
3.) Susie, you unload the dishwasher and vacuum the living room while Billy scrubs the floor of the spanktuary.