The Bible tells us in 1 Timothy 2:9-10:
We were somewhere recently surrounded by other Believers, where the teens were swimming. The girls were wearing bikinis. Very low cut bikinis. The lack of covering wasn't leaving much to my own imagination, so I know it wasn't leaving much to the imagination of the teen boys that were swimming in the pool with the girls, much less all the single men and married men sitting poolside.
I have two daughters and it is my job as their mother to teach them how and why we need to dress modestly. Summer time is upon us and when it comes to bathing suits, my girls wear one pieces. Yes, when they were toddlers, they had cute little ruffled two pieces, but that was when they still had some baby chub on them and it was cute. But we're at a stage now where we're trying to teach them modesty, and it's tough, especially when fellow believers don't hold modesty in the same regard.
Hannah recently attended our church Youth Lock In, aka all nighter at the church with devotions, music, games. There was a young lady who spoke on the topic of what things are pleasing to the Lord. One of the things she addressed towards the girls was the subject of dress and presenting themselves in ways that are pleasing to the Lord. The days following the Lock In, Hannah asked me if I thought the purple nail polish she was wearing was displeasing to the Lord. Of course it wasn't. But it opened the doors for me to tell her exactly what would be displeasing to the Lord as far as clothing went.
A couple weeks ago, my Mom and I took the girls to the beach, to escape the Inland Empire heat, and to have a picnic on the beach. We were all set up, chairs, blanket laid out, just chilling and relaxing under the umbrella, when a teenage girl and her boyfriend set up their spot down a ways in front of us. It wasn't long before she was peeling off her clothes, reveling the bikini that laid beneath. The topic of conversation that came next for us, was explaining to Hannah the lack of modesty the young girl exhibited.
I'm not saying that two piece bathing suits are wrong. In fact, Old Navy and a lot of other stores these days sell very cute two pieces that include board shorts and rash guard shirts. Very cute. What I am saying is that we as women, especially those of us who claim to love and follow the Lord, need to think about our bathing suits, in fact think about our entire wardrobe, and ask ourselves if the article of clothing might be lacking in modesty, perhaps even displeasing to the Lord.