>>27968703The best way is to start by teasing your trainer. Make it look innocent. Bend over to grab things, and show off the goods while you do so. Make sure to plump up a bit first if you are a male. Cuddle with your human, and "accidentally" nudge their crotch, or bump their hand with yours. Don't overdo it, make them seem like honest accidents, and accidents don't happen regularly.
Most humans have a weakness to repetition. Give it a few weeks, or even months, and be patient. Eventually they will start to fantasize, about you, and eventually will start masturbating to thoughts of you. After that, just catch 'em in the act, and they are yours.