1. Because you can’t get to sleep
2. Make-up sex
3. Break-up sex
4. Your friend told you about a new position
5. Revenge
6. Rebound
7. Paratrooping / bangin’ for roof
8. Nothing good on TV
9. Because you’re in a hotel
10. Curiosity
11. It’s raining
12. It’s halftime
13. Diet / exercise
14. Celebrate recent weight loss
15. You finally get the chance to show your childhood bed some action
16. Prom night
17. You’re already at their place and don’t want to have to move your car
18. Show off new lingerie
19. Celebrate major victory by favorite team and / or political candidate
20. Your chance to do it in a specific location (ex. airplane, Burger King bathroom)
21. To prove we’re not in a rut
22. Stress relief
23. Just shaved legs
24. Forgot to buy a birthday present
25. “Let’s Get It On” by Marvin Gaye is playing on the radio
26. Celebrating the joy of life after a near-death experience
27. Your one chance with a celebrity
28. Time an egg
29. To avoid cleaning, studying or doing work of any kind
30. She wants to
31. It’s cold outside
32. Cheer someone up (pity)
33. Keeping up with the neighbors
34. Your roommate is out of town and you can do it on the couch
35. Some very protected sex to celebrate the fact that I’m not / we’re not / you’re not pregnant
36. Practice
37. They have air conditioning and you don’t
38. Because he / she is from one of the countries you haven’t had sex with a person from yet
39. “Damn, your calves look good in those cargo shorts” sex
40. Called / tested the wrong person but she was into it anyway
41. Because she looks like your superhot cousin and this is the closest it will ever get to it being okay
42. Breaking in a new apartment
43. Because he says he loves you and you’re not ready to say it back yet
44. Wingman diving on the friend grenade
45. Your condoms are about to expire
46. It’s getting a little hard
47. Miscommunication (Cheetos sex)
48. To reinforce good behavior (such as shaving and dental hygiene)
49. To change the subject
50. Love ♥