Are there any workouts that men shouldn't do?

The plans' name is "Bikini Body". I was like, "I should probably stay away from this. But what happens if I did it anyway?"

Then you'd have to invest in bikinis, because it's the rules.

The only kind of workout that could make a man look more "feminine" would be the opposite gym bruh: only do leg days, always skip arms, especially shoulders. Even then, it's unlikely that you'd end up with a more "feminine" body. Look at pro cyclists' legs and glutes.

No. Doing workouts doesn't make women masculine or men feminine. Nor does it make people of any gender identity anything other than what they are.

American football players are constantly doing glute and leg exercises and have pretty strong, and therefore large, asses. Are they "feminine" for that?

There are no exercises you should not do because of your gender identity or sex. There are plenty you might want to avoid because they are unsafe or too difficult for you at.your current fitness level, but that's it.

I'd say all people can benefit from different types of workout. Like flexibility training and yoga is more likely to be done by women but if you don't want to start making old man sounds every time you sit down by age 30, it's a good idea.

Similarly, women can benefit from strength training as much as men, particularly since they have a greater loss in muscle mass into old age (causing other health problems). And despite stereotypes, you're not going to become huge just from lifting heavy weights (and a middle aged man is not going to become a lithe gymnast just from flexibility training).

Suppose you did that workout anyways, then... You did that workout and did something to stay fit. That said it may be a workout designed to help you with achieving a certain look. So unless you are keen on looking like that it may be better to not do that workout a ton. The reason why it's named like that may be exactly because it will help you to get that look or to motivate certain people to do that.

Kegels.