Flow Control Help

[RoadToSensei]

I am having a hard time programming a Rock Paper Scissors Code:

import random, sys
Wins = int()
Losses = int()
Ties = int()
print ('Lets play Rock, Paper, Scissors!')
print ("0 Wins, 0 Losses, 0 Ties")
print ("Enter your move: (R)ock (P)aper (S)cissors or (Q)uit")
Player = input()
while Player == "R" or "P" or "S" or "Q":
    if Player == "R":
        print ("ROCK vs...")
    elif Player == "P":
        print ("PAPER vs...")
    elif Player == "S":
        print ("SCISSOR vs...")
    elif Player == "Q":
        print ("Thanks for playing, sore loser")
        sys.exit()

I use a while loop to limit the user to only input [R]ock [P]aper [S]cissors or [Q]uit
However, when inputting a value outside the R P S or Q range. The code still runs and returns the computer value.

How can I properly limit the user to only input R P S or Q?
Why does my while statement not properly limit the inputs?