Different things make different people click, unfortunately for them they live in a society and they have to comply by the rules set by Law and community.
Maturity might and might not be the reason behind your friend's action but it sure don't bother me for him to do what ever he wants as long as he doesn't cross the line, shouldn't bother you either unless it's affecting you directly.
ON the bright side he seems to be fun to hang around from the sound of it
