I feel rather silly having to ask, but fortunately if I blush you probably would not know, so here I go:
Which of the following is correct?
1. Rou seldom tell jokes.
2. Rou seldom tells jokes.
If I have to bet money on it, I think I'd probably choose 2; but since I don't, I must say that to have "tells" sounds rather strange to me - and I just can't shake off the feeling, that's why I asked.