In games I go for the option that gets me the most lewd scenes, in real life, nah man, no cheating (consensually lewding other people is not cheating imo)
I usually do corruption, because in my experience, the girls are lewder when corrupted....
Nothing actually prevents them being lewd on the romance route though, I guess that's just not a combo that's done often (can't even think of one), romance route but with an extremely kinky lewd...
Have you tried the prompt 'hands behind back' ? ;)
j/k although I do that cheat myself sometimes
I've seen this as a prompt helper for the hands:
(-bad hands -unnatural hands -fused fingers -too many fingers -extra joints)
In a lewd game I love to give names like "slut","whore","cunt","cockhole","spermrag", ... kind of ups some of the dialogue for me
In regular games I usually go with whatever is default