Cheating one's wife/unfaithfulness is VERY COMMON in France and people at every age care about sexual attraction more than anything else in the world--more than money sometimes.
Some stupid Chinese ladies need to understand that the other side of "romantic" coin is unfaithfulness. Compared with American mid-class white man, a french husband is a much worse choice for marriage.
BTW, What he did is very common and understandable in France. For me, he looks flip-flop in terms of political decision-making. You overestimate his power--lots of decisions are already in the hand of European commission, NOT in his presidential palace.