Doctor Who: Every Doctor Kiss Ranked Worst To Best
20. The Eleventh Doctor And River Song #2
Given that River Song is actually married to The Doctor, it's no surprise that she's managed to kiss her 'sweetie' multiple times, four of which have been shown on screen and all of them with the Eleventh Doctor.
Their one at the end of Series 7's Let's Kill Hitler, is by far and away the worst of the lot. The kiss is made to save The Doctor from dying, which is actually quite poetic given how it was a poisoned kiss from River earlier on in the episode that threatened his life.
The major problem is that at this point in the timeline River isn't really in love with The Doctor, which means their kiss isn't really that romantic and just doesn't feel earned compared to the rest. It lacks any real emotion and drama and is there more to help drive the plot forward. Steven Moffat overly-relied upon the whole 'love is the answer' story device during his time as showrunner, and this is just one of many episodes where it was haphazardly used.