I disagree that past 25 is too old. Hell, I have even banged some 40 year olds in TJ and had a great time.
About 10 years ago, I have even banged one bald chica who was in her late 30s and wore a blonde wig at HK. HA HA, my buddies made fun of me for quite a long time on that chica.
As for chicas retiring, I think when they can no longer get a monger to pay them $, then they should hang up their shingle and start selling chicle or dolls. As long a monger pays them money, why retire? Where else can you make that quick money in TJ other than slinging dope?