A little is in order.

Shit! That's Dan's friend! You see Dan's varsity teammate walking through the park, You see him from time to time to your house. Last time Dan brought his varsity friends home, they got too wasted, threw a party, and then broke one or two vases. Mom grounded me for a good month after that. Jeez. Maybe a little change is in order...

Looking around, you see the woman jogging. She's definitely really hot, curves in all the right places. Her breasts are bigger than her head, and her hips are wider than her shoulders. You remove reality change and swap her nipples with Dan's Friend's nipples. God, the concept of that is a little bit sexy. You also decided to swap their endocrine systems. He's definitely gonna notice that in 1 to 2 years.

As you finish the swap, you notice Dan's friend stop. His shirt is definitely tented. Seems like you gave him puffies. He starts rubbing his nipples? LOL. After a bit, he walked away, looking around probably seeing whether someone saw him feel himself up.