???

That's a Lot of Rowing:

Young couples start falling apart after only three years these days, because of 'the stresses of modern life.'

Romance begins to fall flat at this point as couples take each other for granted, argue ever more and lose their sexual appetite, researchers say. Those in three-year plus relationships row for an average of 2.7 hours per week compared with 1.2 hours for those still in the first flushes of love.

I don't sustain three hours a week of "rowing" with everyone I know put together, nor would I wish to do so. That sounds exhausting.