Jana Kramer's hubby Allan Russell is keeping it strictly couples-only ... saying he skips the solo pleasure sessions and saves all his stamina for when it’s showtime with wifey!
The Scottish ex-footie star kicked off the ballsy convo on iHeartRadio's "Whine Down" podcast -- hosted by Jana herself -- claiming his sex life with the wife is so solid, he's not about to fumble it with a solo bathroom play.
Allan doubles down, saying the "essential and physical moments" he shares with Jana keep things so spicy, so there's no need to score alone when the home team’s winning.