But I also don't think this is very necessary, since if your enemies' attitude is high, they'll automatically assume you as Bottom no matter what your current Position is.
It kinda depend on the enemy. Bandits don't like being overtaken, that's why their attitude towards you drop when you top them. Nymph attitude always drop when the fight ends with someone losing whole HP, doing a naughty stuff with her always raise her attitude. So it's all about the 'character' of the enemy.
But with the next update Love Potion will have another use. It can be used on the enemy and it will raise their affection.