Zero.
I've always been intrigued with the idea of taking one just to see what happens. It would be fun to see just how far some chemical assistance could take me.
But I'm afraid my spouse wouldn't want to stick around for a multiple course meal. She's usually satiated by the end of what I though were the appetizers.
Short answer - What's the ideal handjob? The next one.
Longer answer - The Three "E" z's 1. Enthusiasm - a partner who wants this as pleasure for her as much as she wants it for me. 2. Engagement - communicate with eye contact, and verbal cues. This can include fantasy stories, teasing, or simply excitement of what is happening in the moment (see #1) 3. Eroticism - relish the details of the physical and psychological act. Use the sights, sounds, smell, and tastes to weave a moment set apart from the rest of the day (or night).