osculate (v)
To kiss (mathematically). This is a geometry term used when a pair of curves or surfaces touch on a common tangent. Using the word as "kiss" has a humorous context, but I'd imagine it would be perfect to describe two science scholars in love.
This word always grosses me out. Or rather, it's useful for ironic writing...too much PDA can be neutralized by calling it "excessive osculation."
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