I just went to co-ed baby showers and the guys had just as good as a time than the women.
Both of pregnant women were young 17 and 21.
They played plant a kiss on Edward from Twilight. They had a poster of Edward and they had pre-kissed some sticky paper so the players can place them on the poster. If you don't want to do that then you can find a game online or in a store where they have a giant baby and you can take a square of toliet paper and fold it like a diaper and have the players pin it on the baby.
There was also the clothes pin game were you can not cross your legs. They used blue baby toy clothes pins because both ladies were having a boy. They added a twist which was much harder. Along with not crossing your legs, you could not say baby or the pregnant persons name. That was hard. And this one you play until after the presents are opened and if the presents are going to be opened until the guests leave. You can play until after the cake has been served. This game is the finale so it would be the grand finale gift.
They also played another clothes pin game and they used clothes pin that you hang on the clothes line and they put these pins on a hanger and the players had to with one hand pick the clothes off the hanger one by one. They could not adjust the pins in their hand by adjusting them anywhere on their body and if they drop one their turn is over. The one with the most wins.
There is also the tiny safety pins mixed with rice in a bowl. pour a cup of rice in a bowl and a package of the smallest safety pins you can find and mix the pins with the rice and the player has to pick out the pins and the one with the most wins.
You can go online and google babyshower games and there are some games that you can print out. For instance jumbled words like crib, bassinet, bottle, etc and this is a time limit game and the one with most correct answers win. Be careful there will be cheaters.
I found out that the guys don't want to do the cottonball game.
Have fun and good luck.