Some times i see short guys get the lead in sex but the short guy always very strong so I think it he is an ordinary short guy he will be weak and won’t be able to hold the man in front of him a man body is strong and heavy after all they need power to hold it, this is only my conclusion though, some day i was joking with my nephew he was a short teenager boy he was ordinary not playing sports or any thing and when he hugged me to stop me from moving I couldn’t move or free myself or left him an inch from his place, i was so surprised I couldn’t believe it, he didn’t look that strong he is not taller than me either, just imagine a bigger man and more muscular body, how strong would it be, if the guy was shorter he should have enough strength and guts to do it, or he will end up being the uke. That time I thought that the people who get raped really had it rough at the time I couldn’t defend myself at all that was scary for me, after that I stopped joking around too much.
When you say "I think it he is an ordinary short guy he will be weak and won’t be able to hold the man in front of him a man body is strong and heavy after all they need power to hold it", do you not know that normal sex doesn't *require* restraining the person being penetrated? Obviously a weaker man can penetrate his partner and/or take a dominant role. Jeez. There is no "seme" and "uke" in real life. The closest terms are "top" and "bottom" but they only refer to penetration (the "top" is the one who puts their dick in the other person, the "bottom" is the one receiving it), it has nothing to do with personality, physical strength, perception of masculinity, or anything like yaoi stereotypes. Most gay/bisexual males enjoy being both the top and the bottom, and couples usually switch back and forth! Some heterosexual males like both as well, the prostate works the same way regardless of sexual orientation, so there are some huge male bodybuilders that get topped by small females wearing a strap-on dildo.
I forgot to say, your statement "if the guy was shorter he should have enough strength and guts to do it, or he will end up being the uke" is incorrect and actually pretty fucked up. That's not how normal sex or healthy relationships work at all. You're not a gay man so why are you making all these claims about how male/male sex works?
Also you were saying something about your nephew jokingly holding you back and that made you think of rape victims (I didn't really follow your train of thought entirely), but rape doesn't always involve physical restraint. Frequently the threat of violence is enough to make people too scared to fight back, or sometimes rapists control their victims emotionally, or threaten to harm someone the victim cares about, or to expose something that could ruin the victim's life, etc.
I reckon the last couple should switch roles. It doesn't always have to be that the shorter guy has to be the uke. Plus the seme said he might be a bit a masochist so it makes more sense for him to be the uke rather than the other guy who quite clearly hates it and seems more dominant anyway. I would love to see more of that couple if it meant they switched roles. ლ(´ڡ`ლ)