It's more like two strips of tape. The more you stick them, the less sticky they become. They are never as strong as the first time they are stuck together. It's the same with relationships. The more sex you have with different people, the harder it is to maintain a long-term sexual relationship.
There is such a thing as too many, but people will refuse to acknowledge that sleeping with multiple people is wrong. They see it as a lifestyle choice. The people become their own gods and suffer for it. God's way doesn't always make sense to us, and it's not always as enjoyable as sin, but He knows what's best.
Two monogomous partners who have never been with anyone else and who never cheat on each other will NEVER suffer STD's, NEVER feel the hurt of being cheated on, and NEVER have to deal with being compared to someone else in bed.
I myself was not saved when I was younger and slept with a LOT of people. I've been cleaned and redeemed, but that doesn't mean my husband and I don't suffer some consequences of it. I accept those consequences and we work through them, with God's help. But I know that they wouldn't be there if I'd turned to God in my youth and lived right the first time. I also know that we will never leave each other, never let divorce be on the table, and our emotional connection is as strong as it would be if I hadn't been promiscuous in my teens. God makes a way to cleanse us from the things that make us feel dirty and ashamed. That way is Jesus Christ.
So, yeah, there is such a thing as too many, but if your eyes are blind to see, then it doesn't really matter, does it? When you are lost, you don't always know it. And sometimes it's more fun. So I suppose it's up to you to decide how much is too much and how many is too many.
Do you have trouble keeping long-term relationships? Do you even have the desire to be married? If you did marry, would divorce be a viable option during troubled times? Have you ever had an abortion for the purpose of birth control rather than health reasons? Have you ever been treated for an STD? The answers to those questions tell you a lot about where you are sexually and spiritually. If you don't care, then that's your thing. If you do care, maybe it's time to find a better way.
1-800-NEED-HIM is a number you can call if you have questions about how to wash all those past partners away and start new, to be able to have a strong life-long marriage with the man God chooses for you, as though he were the only man you'd been with.
When seeking others' opinions, maybe it's better to fear God and not men. In other words, worry about God's opinion and not ours. Maybe it's time to stop sleeping with guys you're not married to and let go of the guilt. "Go and sin no more" is what Jesus said to a woman who had many partners, and wanted something better. Did he condemn her? Make her feel guilty? No. He forgave her for her past and encouraged her to change and live right from then on. We can have the same freedom.
God bless you all.