I myself have been trying to find an answer to this question for a long time, but I can't find any exact information. Thanks all! By the way, thanks to this question, I met my girlfriend ahah. While I was looking for an answer to this question, I met a girl on a dating site. We had a nice chat and I decided to ask her this question (although I understood that she probably could not help me in any way), as a result, she did not respond to my message for 20 minutes. I thought that she probably thought I was a nerd and decided to just not even answer me. But what was my surprise when she answered and was able to really help me. After this situation, I fell in love with her and tried to show her romantic gestures in every possible way. By the way, we've been together for six months.