Naomi advises Ruth as follows, in Ruth 3:
One day Ruth’s mother-in-law Naomi said to her, “My daughter, I must find a home[a] for you, where you will be well provided for. 2 Now Boaz, with whose women you have worked, is a relative of ours. Tonight he will be winnowing barley on the threshing floor. 3 Wash, put on perfume, and get dressed in your best clothes. Then go down to the threshing floor, but don’t let him know you are there until he has finished eating and drinking. 4 When he lies down, note the place where he is lying. Then go and uncover his feet and lie down. He will tell you what to do.”
Boaz clearly likes this, saying in verse 10:
“The LORD bless you, my daughter,” he replied. “This kindness is greater than that which you showed earlier: You have not run after the younger men, whether rich or poor.
Now, it is my understanding that in many cases, the "feet" are actually a euphemism for another part of the male anatomy. Given the situation and the tone, should I infer that Ruth was actually doing a bit more than unlacing Boaz' sandals?