It never occurred to me that a marriage might be so passionate that a couple couldn't sleep in the same bed. But that is exactly what I discovered in my own marriage.
Separate beds might have sufficed, but I decided that we should have separate bedrooms. This arrangement has many advantages. I initially put him in another room simply because his raging erections were constant throughout the night poking at me, hoping for attention; needless to say, I wasn't getting any sleep. Now his room is located conveniently next to the kitchen where many of his household duties lay. I have the master bedroom, and it serves as a nice retreat with a spa room adjoining my bedroom.
My husband is the best massage therapist I've experienced. So, it's nice to have a nice foot bath with foot massage in a reclining chair and then move to the massage table where he gives a deep massage with oil, and then moves to the hot and cold stone massage. After it's over I lie on the table and meditate with salt lamps and meditation music while he turns down my room. I get in bed, and he arrives with a pitcher of ice cold water and pours my evening water glass, asks if there's anything else, and if he can be excused. I then read for a bit before going to sleep while he cleans up the spa room.
With semen retention, my husband nearly always yearns for me. I have found that sleeping apart allows us both a better night's rest. A semen retaining male is just going to be more amorous, hoping, yearning for some attention. I think retaining males need a whole separate room. I like him to be completely detached from me at night. Personally, I don't think separate beds in one room would work for us. I need to have that space. I don't need to hear him humping his pillow at 4 in the morning in his sleep. If you don't have a spare bedroom, and you don't have children, he could set up a little bed in the laundry room or maybe a pantry, not the living room or kitchen. Somewhere where he can have his own mostly private space would be more appropriate.
Aside from amorous retaining males, I think the whole concept of a marriage bed breeds contempt for each other. If you're not going to be having intercourse, a couple should not be in bed together. The only time I'm in bed horizontal with my husband is when I need his services. This is just sound behavioral science. It's very rare that we have sex in my bedroom as this is reserved for a special treat, and it keeps my sheets clean. Intercourse always takes place in his room. Now, with separate rooms, when I lay beside him, I'm a stimulus which causes arousal and sexual stimulation.
In a marriage bed, people become a continuous stimulus to each other, sleeping, reading, watching TV (perish the thought). In behavioral science, a continuous stimulus ceases to be a stimulus. That's the exact opposite of what you want. You're married, not room mates! With separate bedrooms, when you lay next to him it actually means something. When I enter my husband's room, and he removes my clothes, his heart starts racing in anticipation. This is just one modification that we've made since he started retaining that has made the times when we do have contact even more passionate. When I walk away after sex, he wants badly for me to stay longer. That's the way a man should feel about his wife.
(Read more at FLR 101.)