Sports and gender?? How would you handle it?

So my husband and I were discussing what kinds of things we were going to introduce our daughter to when she's older. Obviously your kids will like what they like but I want to push her to be involved in sports and dance and everything so she knows what she likes and doesn't like and I think playing sports and being on teams are great for children. So then we got on the subject of when we eventually have a son and what if our son wants to do dance or gymnastics and my husband gave a look of horror cause he's a macho army guy but I told him that kids that age don't know the difference and I don't want to limit our kids because boys should be doing one thing and girls should do another so then my husband said he would tell our son that dance isn't for boys and I freaked and said "no you will not." But I'm wondering what everyone's take on this is? How have you or how will you go about certain gender related things?