This is obviously just a convenience thing, the actual action is remove penis-put on condom-reinsert penis. But now you don't need to deal with the hassle that is to press a button to remove the penis, then press a button to equip the condom, and then press a button to reinsert the penis. Not to mention that when it's not you doing the fucking, but your partner or even a third person, then this whole chain can get messed up, depending on the relevant permissions and fetishes. The person with the penis might decide to resume fucking after you told them to stop penetrations but before you can equip a condom on them, or they might not resume fucking after getting a condom onto their penis." Condoms can now be equipped onto a character's penis even if their penis is involved in an ongoing action, so you no longer need to stop ongoing action, apply condom, then restart the action. "
Now that is an impressive magic trick. Pick a condom any condom.... later TADA is this the one you chose?
This is a good little fix, there's enough to criticize about the game without grasping at straws.