As everyones else has said you could be a switch or you just may enjoy it...i mean Doms do like a lot of attention and this would prolong it..
as for suggestions..
1. i got this off a site that i have
2. I would also suggest mental teasing works well also.. She could call you during the day whispering about different times you have had or how she will tease you agian when you next meet..This is a fun, and frustrating, technique that can bring some of the spark back into sex. There are a hundred variations, but the basic idea is simple: prevent your partner from having an orgasm for a length of time (a day, two days, a week, whatever you want). You shouldn't make it easy; you can, for example, require that your partner have sex one or more times a day, or masturbate regularly (this works well when combined with a ritual of some sort), but your partner is not allowed any sexual release. Over time, the sexual tension builds up, and your partner becomes perpetually aroused.
When done over a period of several days or longer, this technique creates a very powerful level of sexual excitement. When you do finally allow your partner release, it's an extremely intense experience.
3, She could give you notes to be opened at certain times of the day {putting the time on each envelope}.. That you must read wherever you are at that time. In them a thought is put to get your mind racing.. and you must concentrate on that thought til you are good and hard yet again.
4. Making you count down from 5 to 1 {1 being when you shall cum} as you come to an orgasim not allowing you to go passed 2 each time and stopping dead with her teasing for a few minutes to allow you to calm down and not cum.
5. Making you beg for it and if you don't she will stop at say 3 or 2..
6. Making you jerk yourself during the day each hour but not cum only allowing yourself to go to say 3 as you count down.
7. another would be getting you to wear a cock ring during your normal daily routines and making you ahrd before you set off for those routines.
These things can be done over a long period of times as well.
These are just some suggestions off the top of my head. If you would lke more let me know.
i hope this helps you
hugs
snow