I was shown Shulchan Aruch Harav 619 :
וְעַל כָּל פָּנִים יִזָּהֵר שֶׁלֹּא לְכַסּוֹת רַגְלָיו, זֵכֶר לַדָּבָר "וַתְּגַל מַרְגְּלֹתָיו" שֶׁל בֹּעַז, שֶׁלֹּא יָבוֹא לִידֵי חִמּוּם:
One should at least leave his legs uncovered, as alluded to by the uncovering of Boaz’ legs (Ruth 3:7), so that one’s body will not become excessively warmed.
If i understood correctly that on yom kippur men should not cover their feet so not to get sexually aroused.
What did the uncovering of Boaz' feet symbolize? What does it have to do with arousal?