What is this thing that I look down upon?

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Since the beginning of May I have got 768 km riding the bicycle. This week so far I have got 6 1/2 hours of exercise.

This morning while commuting to work I noticed two cyclists who had stopped on the cycleway, and they were kissing passionately, completely unaware of what was happening around them. However, the safety aspect was taken into account, as they were wearing bicycle helmets. Could this work in an ad campaign about bicycle safety? Or safe sex?

(Posting title is from the poem The Wild Common by D. H. Lawrence.)