A few of my friends, yes my friends who are older than me, do it when they are drunken. I do not like it. Most of them are impolite, unsocialized and immature in their mind, although they tend to be smart and intelligent in some sense, and like me as a friend or a colleague.
BTW, a few young men sometimes ask me whether they may touch my legs or other parts, and I think it is OK because at least they ask my consent.
barbie~~