No, there were various theological and practical (inheritance) grounds, I don't think anyone can find evidence for this being an acknowledged purpose. However it could still be an unspoken purpose and it could still work that way. I actually find it very reasonable, given how geeky Catholic priests and monks tend to be, they are prone to typical nerd traits like hair-splitting arguments, they are pretty much like the nerds who can't get some and thus better to rebrand it as a virtue. Just it was not an explicit, outspoken purpose.

I should also say, there were no sexual rejects in the modern sense. Just have a wealthy father, someone will arranged-marry their daughter to you.