Because they love you , 9 times out of 10 they'll do anything that you ask of them. But don't expect them to be grinning from ear to ear about it.
I talked to several past, present, and future bridesmaids who informed me of the things they'd really rather NOT do.
Your bridesmaids DON'T want to:
1. Wear ugly and uncomfortable dresses
2. Spend all of their cash money on that dress they hate
3. Be in charge of doing hair
4. Be in charge of doing makeup
5. Be in charge of taking wedding pictures
6. Be forced to dance
7. Feel obligated to throw a shower especially when nobody else wants to contribute
8. Buy and wear uncomfortable shoes
9. Buy the same shoes as everyone else, especially if they cannot walk in them
10. Be expected to give an elaborate speech, especially if they're shy
11. Be forced to dance with somebody that they just don't want to dance with
12. Miss out on your dress fitting
13. Be expected to make every pre-wedding event if they truly cannot attend
14. Have to throw down more money than they have for multiple events
15. Have to pay for multiple accessories they're expected to wear
16. Learn a dance when they have two left feet and no rhythm
17. Be expected to make important decisions that only the bride should make
18. Be bossed around for the entirety of the engagement
19. Be treated like a handmaid
20. Have to babysit any children during the rehearsal/reception
21. Not getting to bring a plus one
22. Be left in the dark about what they're supposed to do for the whole engagement
23. Have no idea what to do come wedding day
24. Change anything about their appearance
25. Be expected to lose weight solely for the wedding
26. Have to buy a ridiculously expensive present
27. Have to travel long distance for multiple events before the wedding
28. Have to say yes for everything
29. Have to have the same hairstyle as everyone which may not look good
30. Feel or look bad for being broke
31. Be expected to know what you're thinking 24/7
Bottom line is that there are definitely a few things bridesmaids would be thrilled to not have to do. But because they love you, they'll do whatever it is that you ask without hesitation.